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.

The quirky, offbeat and energetic botanical name Ivy is enjoying a deserved revival, propelled even higher by its choice by high-profile parents Beyonce and Jay-Z for daughter Blue Ivy. Ivy is also traditionally used at Christmas, make this one of the perfect names for December babies.

River shares the tranquil feeling of all the water names, and seems to have pretty much escaped its past strong association with River Phoenix and his unfortunate fate. Actor Joaquin Phoenix named his son with actress Rooney Mara after his brother River.

Strong but sweet, Leah is a classic name that doesn't feel dull or dusty. It's got plenty of dignity, grace, and pluck, making it a solid choice in the 21st century.

Landon is a popular surname name; it's been dropping slightly in recent years but has surpassed its once more popular rhyming cousin Brandon. For some it may bring back nostalgic memories of Little House on the Prairie 's understanding Pa, played by Michael Landon.

Sky may be a bit hippie-ish, but it's bright and sunny nonetheless. Sky rejoined the Top 1000 in 2013 after spending many years off the list. Sky was the choice of magician David Copperfield for his daughter, born in 2010.

Dune is a name of several layers. It's a modern nature name, like Ocean, Bay and Reef, although rarer, conjuring up images of breezy sand dunes on summer beach days.

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

Mostly feminine, though "Office" star Rainn Wilson gives it a slight masculine twist. You might also use this as a short form of Raines.

Roselyn was a frequent member of the US Top 1000 in the early twentieth century until it dropped off the charts in 1954. It didn't return until 2003.

With the rising popularity of Kai, this more phonetic spelling has been gaining traction as well. Kye debuted in the US Top 1000 in 2015, and was one of the fastest-rising names of the year in 2016.

The nature boy version of the Scandinavian Leif, which actually means "heir". In the creative-naming Phoenix family, Leaf is the former name of the actor we know as Joaquin.