This variation of Theodore is familiar here mostly via the great Russian novelist Dostoyevsky. It was also the name of three early tsars of Russia.

With the advent of Pope Francis, all forms of this ancient and saintly name came up for a fresh look. Along with most other -een and -ine (when pronounced like -een) names for girls, Francine has a dated midcentury Mad Men feel. But its choice for their daughter by modern glamour couple Casey Neistat and Candice Pool, respectively a video star and a jewelry designer, has made Francine chic again.

The Christian name of the dashing Mr. Darcy in Pride and Prejudice— it was his mother's maiden name— is just one of several Fitz names, including Fitzroy, Fitzgerald, Fitzpatrick, that could be used to honor a dad named William, Roy, Gerald or Patrick.

Fig was the unlikely name of a beautiful character in Curtis Sittenfeld's Man of My Dreams. Better bets: Plum, Quince, or even Apple. Still, you might consider Fig as an unusual nickname for any more formal F-starting name, from Frances to Fiona.

Fianna, a virtually unknown Irish name in the US, combines the best elements of Fiona and Brianna. In Irish and Scottish mythology, the Fianna were independent bands of warriors. It has ranked in Northern Ireland's Top 100 for girls several times over the past decade. The name also has potential political connotations: Fianna Fáil is a conservative Irish republican political party.

Because the legendary Faust sold his soul to the devil, few parents would choose this for a child, although Fausto is commonly heard in Italy and Spain.

This unusual Scottish surname was made immortal by Michael Faraday, a British scientist who contributed to the fields of electromagnetism and electrochemistry. His name is now a unit of scientific measurement for electricity - a 'power'ful name for any little boy.

Long before the vogue of using Irish surnames for girls, writer Flannery O'Connor gave this one some visibility. It has a warm (flannelly) feel and the currently popular three-syllable ee-ending sound.

The Forest variation of Forrest, used by actor Whitaker, nudges the meaning more toward the woods and away from the woodsman.

The doe-eyed Fawn is as gentle and soft as the baby deer it represents. And much like that baby deer, it carries with it the potential of new life. Fawn was featured at the bottom of the Top 1000 throughout the '60s and '70s — around the same time that Bambi came into play. But unlike Bambi, Fawn maintains relevance in the 21st century, thanks to its warmth and ties to the natural world. We would love to meet more baby girls named Fawn.

More unusual than Fiona and more user-friendly than Fionnuala, the engaging Scottish Fenella, has been scarcely heard in this country.

Fauna is the Roman goddess of the earth as well as one of the fairies who protected Disney's "Sleeping Beauty". It can also be considered a word name with a scientific, nature focused feel. Used to as a way to refer to all the animals in a particular area, habitat, or time period, many might think of the phrase "Flora and Fauna" on seeing the name.

Made famous by F. Scott Fitzgerald and John Fitzgerald Kennedy; still works best as a middle name.

It feels like Finch should be a modern bird name that's as popular as Wren or Lark, but that's not the case - so it's one to consider if you're looking for a nature name that's familiar but rare.

This short form has been pretty much replaced by Frankie, however, it could fit in with other clunky but charming names, like Peggy, Bess, and Enid.

A lacy, lucky name very popular in the Hispanic community a decade ago, less so now.

As this word is less often used to mean derriere, it becomes more possible to view Fanny as the kind of appealingly quaint nickname name, like Josie and Nellie, that many parents are favoring now.

The Old Norse and modern Norwegian word name Fjord, which refers to a passage in the sea, could work for children of both genders. It conjures vivid blue, ice laden landscapes.

Frederica is an interesting possibility for the parent unintimidated by its old-fashioned formality, and who can appreciate the vintage charm and verve lurking beneath its stuffiness.

Freda, along with near-identical twin sisters Frida and Frieda, has not been popular in the US for decades. After the two world wars, German names fell out of favor in the US and UK. The similar-sounding but etymologically unrelated mythological name Freya is much more popular, not only in the US and the UK but throughout the English-speaking world, in Germany and Scandinavia.