Sibset: A name for Jack’s baby sister

Something traditional and brisk

a Name Sage post by: Abby View all Name Sage posts

They’re naming a sister for Jack, but so far, nothing has that wow factor. What’s the best name for their new daughter – Margot? Felicity? Or something they haven’t thought of yet?

Deanna writes: 

I’m expecting a girl due in July. We have a son named Jack. His name was easy to choose; I loved it for years. My husband wasn’t always on board but grew to love it. He’s never been “wow”ed by any name I’ve mentioned.

When I was pregnant with my son, I was certain that if he was a girl, her name would be Felicity. But now, I don’t feel that way. I still like the name but keep waiting for something else to wow me! It’s like it’s not enough this time.

I want a name that’s recognizable but not too common. We’ve also considered:

Emilia – But it’s too popular.

Celeste – My husband isn’t sure.

Margot – I worry some people will look puzzled when they hear it.

Sabrina – A favorite, but we had a cat by the name. Still, not an absolute no.

My husband’s name is Cory, so any name starting with Cor, like Corinne, is out.

Any suggestions?

The Name Sage replies:

It often feels like names belong to a particular pregnancy. Had you welcomed a Felicity instead of a Jack, I’ve no doubt you’d love the name – and the child! – every bit as much. But Felicity might not fit your sibset for this time around.

It sounds like you already have the perfect name for a girl on your list: Margot. Like Jack, it combines plenty of history with a bright, modern sound.

You’ve mentioned that some might not recognize the name, and I get it. But here’s the thing: it’s the flipside of the wow factor. Unless you stick with the most classic, familiar names, some people will mishear your child’s name, at least some of the time. Emma and Elizabeth may not have those problems, but I don’t think that’s quite what you’re after.

But if Felicity is out, and I can’t convince you of Margot, let’s see if we can find some new sibset alternatives.

Felicity is a lacy, romantic, Valentine of a name, a stylish antique with an unbeatable meaning. It’s a sharp contrast to brisk and energetic Jack.

So maybe we’re looking for a girl’s name that feels a little closer to those qualities – traditional, yes, but with a twenty-first century sensibility. Would you consider:

Cecile Cecilia reminds me of Felicity, but the shorter Cecile makes for a slightly more tailored option. Nickname Cece is darling, but there’s no need to shorten this two-syllable name. (Current US popularity: outside of the Top 1000) 

DaphneLike Jack, Daphne’s been around long enough that we all recognize the name. But it has a certain swing to it. With Penelope, Chloe, and Zoe all in the Top 100, Daphne makes a great stands out/fits in choice. (Current US popularity: Number 385)

Greta – Like Margot, Greta comes from Margaret originally. We all recognize it, but it’s rarely heard on children today. Greta Garbo puts it in the same Hollywood legends category as Audrey and Ava. (Current US popularity: Number 632) 

Lucy – Maybe Lucy strikes you as a bit too popular – and it has appeared in the US Top 100 since 2010. But then, Jack also ranks in the current Top 100. So maybe spirited Lucy makes the perfect sister name? (Current US popularity: Number 52)

Maren – There’s more than one origin for Maren. It can come from the Latin word mare, meaning sea. But it’s also connected to time-tested choices like Mary, which makes it a great twenty-first century update to a classic. (Current US popularity: Number 633)

Mary – Or … just use Mary! No, really. Countless women answer to the name, but it’s surprising how very rare it is to meet a baby Mary. The long-time chart-topping choice now feels like a fresh and delightful surprise. (Current US popularity: Number 126)

Sadie Sadie combines the energy of Daphne with the casual appeal of Jack. Again, maybe it’s much too common for you to consider. But if you like Sadie’s style, this list is one to browse. Poppy, Lola, Millie, and Edie could work every bit as well. (Current US popularity: Number 71)

Tessa – Not so long ago, every Tess was a Theresa. But today, Tessa is the more popular option. Like Jack, it’s an appealing mix of breezy and traditional. (Current US popularity: Number 246)

Thea – I tend to think of Theo as a brother name for Jack. So maybe Thea, the feminine form, would be a great choice for a sister? (Current US popularity: Number 269)

Lastly, I think it’s important to recognize this: sometimes the name only clicks after our child is in our arms. It sounds like your husband feels this way about Jack’s name. Even if it takes a little bit of time, you’ve got some great choices for your daughter.

Now, let’s open it up to the readers for more sibset suggestions. And let’s have a poll, because I’m still convinced that Margot is practically perfect!

Yes, it’s exactly right.

No, I don’t think it works.

Maybe, but I prefer

Should Jack's sister be named Margot?

  1. AYes, Margot is exactly right.
  2. BNo, I don't think it works.
  3. CMaybe, but I prefer another name.
Show current results

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About the author


Abby Sandel is nameberry's Senior Editor and resident Name Sage. Look for her baby name news round-ups every Monday, and her Name Sage columns on Wednesdays. Abby is the creator of the baby name blog Appellation Mountain and mom to Alex and Clio. For a chance to have your questions answered, contact Abby at
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38 Responses to “Sibset: A name for Jack’s baby sister”

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hanmay Says:

April 3rd, 2019 at 1:46 am

I love Esme as a sister for Jack!

katinka Says:

April 3rd, 2019 at 3:26 am

I love Margot, Celeste, Cecile, Daphne and Greta! Spunky, streamlined, sophisticated European names like these work beautifully with Jack without feeling at all expected.

How about Sylvie, Willa, Frida, Anais or Sabine/Sabina?

katinka Says:

April 3rd, 2019 at 3:26 am

Another thought: Cleo!

Kew Says:

April 3rd, 2019 at 6:02 am

Cicely would be perfect – it sits nicely between Celeste and Felicity and has the same fresh, classic feel as Jack.

beynotce Says:

April 3rd, 2019 at 7:21 am

My immediate suggestions based on your letter were Cecilia or Audrey.

Felicity, Emilia, and Celeste lead me to Cecilia, which I prefer to the more tailored Cecile. Celeste and Margot remind me of the classic but still underappreciated Audrey.

However, I think I agree with Abby that you’ve already hit on the perfect choice – Margot.

bw Says:

April 3rd, 2019 at 8:42 am

I love the name Margot but don’t find it a natural fit with a brother named Jack. I like Abby’s suggestions of Sadie and Lucy. I also think Jack sounds like a fresh but classic choice and that makes me think of names like Caroline, Kate and Annie.

UnderTheRainbow Says:

April 3rd, 2019 at 9:27 am

Jack and Margot are on my top 1 of siblings names, so what can I say? To me, Margot and Violet feel like natural fit with Jack.

Clairdelune17 Says:

April 3rd, 2019 at 9:42 am

Joy would be lovely with Jack! Or Julie or Jenny! I still loved Joy the most!

tabitha Says:

April 3rd, 2019 at 10:08 am

Jack & Tessa 💚💜
Perfection! Tessa is traditional but Tess is modern and fresh – exactly like Jack!

rlmurphy Says:

April 3rd, 2019 at 11:24 am

I’m a sucker for old fashioned names, so my two favorites are Greta and Cecile. But for this family I think Sadie or Maren would be a better fit.

JuliaKateElizabeth Says:

April 3rd, 2019 at 11:32 am

I love the suggestion of Tessa! I also like Sadie.

Thinking of your style, a few come to mind as a sister for Jack:
Sienna, Savannah, Olive, Amelie, Nola.

Pansy Says:

April 3rd, 2019 at 12:04 pm

My first thought was either Esther or Olive. Both would pair well with Jack and are familiar without being popular.

Kjh446 Says:

April 3rd, 2019 at 12:38 pm

Jack & Daisy would be a lovely sibset. I feel like Daisy matches your style?

Or how about:

Jack & Lucia

Jack & Anja

Jack & Eloise

Jack & Bria

Pam Says:

April 3rd, 2019 at 1:03 pm

I like the idea of a name that, like Jack, is technically a short form but has been long used as a name in its own right. My first thought was Celia. It’s similar to Celeste and might be a short form of Cecilia, but it’s a name in its own right. I love it and feel it has the same blend of tradition and modern sleekness as Jack.

I like @katinka’s ideas of Sylvie and Cleo but suspect those are going to be too out-there for you. Tess and Tessa have the same feeling.

Other ideas along these lines:
Maisie (could be short for Esme or stand on its own)
Nell (again, short for Helena or stands on its own)

JH Says:

April 3rd, 2019 at 1:06 pm

Caroline is a great choice!

livia Says:

April 3rd, 2019 at 2:19 pm

I think the suggestion of Thea is perfect! It’s short, simple, recognisable and pretty without being frilly. Jack and Thea sound like perfect siblings! I also, like a lot of others here, like Margot as well.

Other ideas:
Lucia (nn Lucy!)

Bobcat108 Says:

April 3rd, 2019 at 2:22 pm

W/Jack being just one syllable, to my ear anything longer than two syllables is mismatched (however, that’s just me). W/Jack I like (apologies for repeats):

Daisy: The meaning is related to Margot, but Daisy has a spritelier, sunnier, & more informal feel to it, which is the vibe Jack has for me.

Sophie: Two syllables, classic, easily spelled/pronounced.

Tamsin: This is probably too far out there, but Tamsin has (at least for me) the same informal yet complete on its own feel that Jack does.

Holly: Not super popular but easily recognizable, & the same informal but complete feel.

Alice: It’s more formal than Jack, but the nn Ali/Allie/Aly goes well w/Jack IMO.

Some of the other suggestions I love on their own but not so much w/Jack (Silvie, Caroline, Cecile, Cicely/Cecily).

I’m going to date myself here…but just don’t use Diane. 🙂

clairels Says:

April 3rd, 2019 at 2:59 pm

Of your choices, I only like Mary and Lucy with Jack. Everything else is too elaborate. How about

Anne or Annie

I like the above suggestions of Sophie and Alice.

catcher5 Says:

April 3rd, 2019 at 4:52 pm

What about Jack and Hannah?

Beau Jean Says:

April 3rd, 2019 at 7:51 pm

Mary is so perfect!

they all go so great with Jack

My suggestions
Ruth nickname Ruthie
Brin short for Sabrina

MamaCat217 Says:

April 3rd, 2019 at 8:05 pm

Margot is great!


PennStateGirl316 Says:

April 3rd, 2019 at 8:14 pm

Before reading any of the post “Anna” immediately came to mind and has stuck with me all of the way through. Jack and Anna seem perfect together!

mm816 Says:

April 3rd, 2019 at 10:11 pm

I especially like Margot, Sadie, and Lucy from the suggestions.

I also think Sally and Frances work well with Jack!

GoogleChrome Says:

April 4th, 2019 at 10:43 am


BluebirdBlossom Says:

April 4th, 2019 at 11:58 am

I really like Greta from this list. Margot is great too. What about Zadie, Della or Millie? I think those are all old-fashioned and go great with Jack.

dresdendoll Says:

April 4th, 2019 at 4:14 pm

Jack and Maggie.

Erin Beth Says:

April 5th, 2019 at 4:30 am

I love Margot with Jack and quite the suggestion of Nell. Other ideas:

Erin Beth Says:

April 5th, 2019 at 5:17 am

A couple more ideas: Lola and Pearl!

babymagic Says:

April 5th, 2019 at 9:52 am

Jack &
Aveline (nn. Avi)

sarah1800 Says:

April 6th, 2019 at 11:07 am

I think Tessa is perfect with Jack! I also like Lucy.

kennamoon Says:

April 6th, 2019 at 7:01 pm

I said maybe because I love Jack & Margot but I also love Jack & Daphne!

Mary,Lucy & Tessa are also nice!

Personally I also like Jack & Bella and Jack & Holly!

ShinySarah27 Says:

April 7th, 2019 at 8:43 pm

My sister’s son is also a Jack. Her daughter is Allison, so mto me, those names go together perfectly. Jack was a name she chose in high school and never abandoned. He’s totally a Jack. Allison was also her favorite girl’s name with no other choices. I personally prefer Alice since I love classic names but my niece fits her name well.

SomedayMommy Says:

April 8th, 2019 at 9:50 pm

I love the suggestions of Tessa & Sadie.

Also, back to your choice of Emilia. I agree it is popular, but you could always chose a less common nickname, i.e. Millie. I think Jack & Millie sound splendid.

I also love:

Isla (Eye-la)
Mila (I think this will be more popular soon)
Molly (I believe someone else mentioned this)

Deannie05 Says:

April 11th, 2019 at 9:54 pm

Thank you Abby for posting my letter, and thank you to everyone for all the replies with suggestions. I love them all.

Another contender, since I emailed Abby is “Beatrice”. I’ll make sure to let you know what we choose!

Cordelia16 Says:

April 22nd, 2019 at 2:01 pm

My first thought was Eliza.

Jack & Eliza sound adorable together.

I also love Tessa, Greta, Sadie, and Margot.

AerieEerie Says:

April 25th, 2019 at 12:14 am

I’m little sister to a Jack! My name’s Lily, but it was almost Violet, Ivy, Ariel, and a few others I can’t remember. Jack would have been Olivia had he been a girl. My grandpa wanted me to be named Jill so we’d be Jack and Jill…

First none biased choice that comes to mind is Amelia.

Deannie05 Says:

June 22nd, 2019 at 11:07 pm

We ended up going with Violet!

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