Hazel--love, warm like Amber, but not really "dated" in a negative sense.
Luella--I don't like this one, its very "down home" country kind of feel to me, and Ella is wildly popular.
Nellie--See Luella, Ellie is overused as well
Della--See Luella, but I do like Adele, Adeline
Mabel--Warm and inviting like flowers blooming in Spring
Mabelline--See Mabel, but even more feminine!
Gladys--I have a soft spot for this one, but I don't think it is "pretty" per se.
Thelma--Not my cup of tea, makes me think of a thick-built older woman with short hair.
Opal--I like this! Violet is popular, Jasper, Jewel, Pearl, why not Opal? Makes me think of a beauty with bright watery blue eyes.
Constance--Nice name, but nn "Connie" is ewwww NMS.
Elva--This one would probably get some sideways looks, but it is simple and sweet, however, I do picture someone with dark hair parted down the middle with brooding eyes!
Betty--Adorable qualities, works for young and old, but I prefer Betsy.
I love Hazel, Mabel, Della and Elva from your list! I think they are wonderful names and are very pretty and girly. I'm not so keen on Constance because it a bit too fussy for me.
My grandfather also had many sisters, I can't remember all of their names but here are some I can remember. I find them quite modern considering they would be in their 80's and 90's.
My grandmother on the other hand was one of 3 girls, they were called Margaret Mildred (My Grandmother), Elsie May and Dorothy nn Dora.
Some ways to get the nickname Betty are;
Bethan (My name, and my dad calls me Betty to tease me!)
Hazel - Beautiful and usable!
Luella - This name rocks, first time hearing it and it's great
Nellie - It's okay and usable just not my particular style
Della - Great!
Mabel - Cute
Mabelline - Hmmm... maybe not usable b/c of the make-up company
Gladys - I think that it's usable, you might just get a few odd looks from people
Thelma - Spunky!
Opal - Pretty
Constance - I really adore this name, unfortunately for me it doesn't work with my last name
Elva - It's usable, just not my particular style
Betty - Absolutely Love it! My favorite way to get to Betty is Elizabeth or just naming her Betty
Luella: Great name, doesn't even sound old!
Nellie: Doable - it's not uncommon.
Mabelline: I wouldn't use it because of the makeup.
Gladys: Not my style at all.
Thelma: Belongs in a nursing home.
Opal: Would be very pretty with a more current name.
Elva: Sounds too much like Elvis to me.
Betty: Bette would be my favorite way to get there.
Hazel- this is far too mainstream now, for it to be old lady. It's still very pretty, in my eyes, though I prefer it in the middle.
Luella- Very cute, borderline too cute. Not sure I can see Dr Luella.
Nellie- the Elephant. Too easily teased. Nell with Nellie as a family nn is much nicer.
Della- Does nothing for me, but I really like Adela.
Mabel- Like it.
Gladys- I feel like -is names will be in the next wave of old lady names to come back around, I much prefer Mavis or Doris to Gladys though.
Thelma- Like it, surprisingly.
Opal- Like it.
Constance- Love it!
Betty- I'm fond of Beatrice nn Betty.