Aspen is part of two groups of stylish and unique baby names: nature names and place-names. The name of a graceful tree in the poplar family with heart-shaped leaves so delicate they quiver in the gentlest breeze, Aspen is also the name of a trendy Colorado ski resort. Aspen started as a unisex name possibility but now is much more frequently worn by girls.

Although Sylvia seems to be having somewhat of a revival among trendsetting baby namers, we'd still opt for the even gentler and more unusual Sylvie. Despite being dated in its native France (where it was popular during the 1950s and 60s), in English-speaking regions it still feels fresh and international without being unfamiliar and has a cosmopolitan, international air. It debuted on the US Top 1000 in 2016.

The musical, sylvan Sylvia seems poised to join former friends Frances and Beatrice and Dorothy back in the nursery.

Sylvanus or Silvanus was the Roman god of the forest whose name is much more often found today in such variations as Sylvia, Sylvie and even Silas than in its original form. But if you're looking for a genuine mythological or Ancient Roman name with a nature connection, this might be the perfect choice.

A grassy place with trees is a nice image to attach to a name.

Althea is a poetic, almost ethereal name found in Greek myth and pastoral poetry, associated in modern times with the great tennis player Althea Gibson, the first African-American to win at Wimbledon.

Foster is one commonly heard last name that makes a fine first. The word foster means "to nourish" — as in "fostering hope", or "fostering a relationship". The only problem with Foster might be its association with "foster child."

Despite the success of so many O-starting boys names--Oliver, Owen, Otis, Oscar--Oswald has not yet shown any signs of resurrection, though he does have the animating nicknames Ozzie/Ozzy and Oz. The name has some literary cred--in Chaucer's Canterbury Tales, Shakespeare's King Lear and a novel by H. G.Wells--and there was early cartoon character Oswald the Lucky Rabbit.

Sleek and sharp Sylva is the Czech variation of Silvia. It could equally double up as a word-adjacent name in English, thanks to its similarity to the metal Silver.

Arden is a gender-neutral name that's sleek and stylish but always seems to bob just below the surface of popularity, despite ticking all the boxes with its fashionable two-syllable, N-ending shape and its awesome nature-inspired meanings. In recent US statistics, 51 percent of the babies named Arden were boys to 59 percent girls.

Linwood is a masculine name of English origin, derived from a surname and place name meaning 'lake forest' or 'pool in the woods,' combining Old English elements 'lin' (pool, lake) and 'wudu' (wood, forest). The name evokes peaceful natural imagery of woodland landscapes with water features. Linwood gained modest popularity in the United States during the early 20th century, particularly in the 1910s-1930s, though it never became extremely common. It has the distinguished, somewhat formal quality characteristic of surname-derived first names. While less frequently used today, Linwood maintains appeal for parents seeking a name with natural associations and a traditional, dignified sound. Notable bearers include American musician Linwood 'Little Milton' Campbell.

One of the many variations of Silvanus, the name of the Roman forest god, and a little-used member of the freshly stylish Sylv- family of names. Silvan is the sleek German and Dutch form. Given to less than 100 boys each year in the US, it's nevertheless in the Nameberry Top 500, perhaps owing to its gentle yet sleek sounds, the -an ending, and the nature-related meaning.

Fairly popular a hundred years ago but out of the US charts since 1978, the quirky yet edgy Roscoe feels very much in step with the trending o-ending boy names popular now, such as Milo, Hugo, and Otto. A Top 1000 choice in the UK (albeit near the latter end), it could make a cool alternative to Ross, Russell, Robert, and Ronan.

A beaming, friendly Irish last-name-first-name waiting to be discovered, though anyone into American history might associate it with John C. Calhoun, a 19th century statesman who defended slavery. There are however plenty of places called Calhoun which might lessen that association.

The surname-style Alden has been on the rise in the US in recent years, while tree-inspired Rowan is a top choice. Combine this with the popularity of names ending in -er such as Carter and Parker and it makes sense why Alder is now 4 times as popular as it was a decade ago. Given to 125 boys in a recent year, it could be a modern way to honor an "Al".

Family surname or feminist statement name? Either way, this literary surname has a cool, current sound.

A busby is the English name for the fur military headdress originally worn by the Hungarian hussars. As a first name, Busby is also the unique name of iconic movie choreographer Busby Berkeley.