Hipster-esque

Monroe is a presidential name which, thanks to the immortal beauty of Marilyn Monroe, is catching on fast for baby girls. Mariah Carey and Nick Cannon chose it for their twin daughter, honoring Marilyn Monroe. Their use of Monroe as a girls’ name did much to revive this Old Man name, a la Sydney, as a newly fashionable choice for girls.

The original oddball celebrity baby name, via Frank Zappa's daughter Moon Unit, who claims she's always liked it.

Long in our category of so-far-out-it-will-always-be-out category, once seen as a gum-cracking 1940's telephone operator, we think it's time to reassess Myrtle, and look at is as a nature name, a plant with pink or white aromatic berries. Ruled by Venus, myrtle is a plant associated with love, peace, fertility and youth.

Pretty sound, provocative meaning, but a little over-the-top.

Introduced to the American public by actress Neve Campbell; it was her Dutch-born mother's maiden name. Neve is an interesting and fresh new possibility, one which Conan O'Brien chose for his daughter.

The skyrocketing success of singer Norah Jones brought this spelling of the name onto the pop charts in 2003. As well as being a spelling variant of Nora in English, it's also an alternative transcription of the Arabic name Nura, from Nur/Noor "light".

Ten times as many boys are named Oak as girls: about 50 boys last year to five girls. Of course, nature names don't have any traditional gender identification the way names like John and Mary do, so Oak works well for all babies. Oakley is the most popular Oak name for babies of all genders.

Though greatly overshadowed by the trendy Olivia, Olive has a quiet, subtle appeal of its own -- and is now enjoying a remarkable comeback. Olive is one of only four girl names starting with O on the US Top 1000. Cool couple Isla Fisher and Sacha Baron Cohen chose it for their daughter, reviving the name to stylishness, and now Drew Barrymore has a little Olive too, as has country singer Jake Owen.

With its relation to Mount Olympus, home of the Greek gods, and to the Olympic games, this name has an athletic, goddess-like aura, making it the perfect Olivia substitute.

Otis has real appeal for parents attracted to its catchy O initial and combination of strength and spunk. The appealing hero of the British TV show Sex Education has done much to propel Otis into the forefront of cool names.

Ottilie is trending in the UK, where the pronounced T helps the name sound pretty and delicate, rather like Amelie and Elodie. Ottilie is less popular in the US, where many Americans pronounce it as a near-homonym for "oddly".

Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers.

Pacific island member of the currently-in-favor Lila/Leila family and one of the most attractive and unique girls' names starting with P.

Paloma is vibrant and ruby-lipped a la jewelry designer Paloma Picasso, but it also suggests peace, as symbolized by the dove. Paloma is a highly recommended striking but soft name, one of the best of the names that mean peace and girls' names starting with P.

Penelope is an unlikely 21st century baby name success story. Off the Top 1000 for 25 years, Penelope jumped back on in 2001 and has been heading uphill ever since, propelled by the trend for mythological names, Spanish actress Penelope Cruz, and some high-profile celebrity babies.

Like Peggy and Patsy, the kind of zesty moniker young Judy Garland would sport in her early let's-put-on-a-show flicks. It fell out of favor (and the Top 1000) for a while, but has recently rebounded by reentering the charts in 2013. Expect it to continue gaining traction as a result of surprise hit Penelope.

Penrose – an ancient place-name and surname derived from several villages in Cornwall, Wales, and the Welsh border country of England – would make for an even more unexpected alternative to quirky nature name Primrose. Intuitive nicknames Penny or Rosie make it feel more wearable.

One of the rarest of the floral names, though not without some teasing potential. Peony is a historical 1948 novel by Pearl S. Buck.

Peregrine is considered to be an elegantly aristocratic name in England, but has never made it to the U.S., where it has been seen as extravagantly eccentric. In the new naming climate, though, it's not beyond consideration — in fact it's already been chosen by at least one Berry.

Consistently popular Latina gem name; good choice for those who can't shake Pearl's grandmotherly vibe.