As trendy as the chic Colorado ski resort and film festival, Aspen is fast becoming more popular for girls than for boys, but this nature name would work equally well for either.

Aspen

Adken 

Adoeete

Alaqua

Amadahi 

Azuolas 

If you prefer the woods to the ocean, you'll want to name your son (or daughter) Beech instead of Beach.

Beech

Branch is an attractive name with associations both with trees and with branching out into brave new worlds.  Baseball's Branch (born Wesley, with Branch as his middle name) Rickey broke the color barrier by hiring Jackie Robinson for the Dodgers.
Like Leaf, Branch makes a nice, not-so-obvious, addition to the tree category.

Branch

If you can name a boy Max instead of Maxwell, or Jax instead of Jackson, then why not Brax instead of Braxton?  Over 3300 boys were named the trendy Braxton in the US in one recent year, but snappy short form Brax is a newcomer used for only a handful of babies.  Brax may feel more popular than that, though, as many Braxtons are called Brax.

Brax

Comedian Roseanne Barr chose this macho nature name for her son. In the 18th century it was used to describe a dashing, fashionable dressed man. Buck fits in well alongside names like Beck, Jack and Huck. 

 The traditional name of the full moon in July, Buck Moon, relates to the fact that the antlers of male deer reach their peak growth around this time of year.

Buck

Dural

An attractive and now underused nature name belonging to a tree whose wood is prized for its dark color and dense texture, which shines when polished. Ebony joined the most popular girl names list in the US in the early 1970s, peaked in 1982 at #132, and dropped back below the Top 1000 in 2006.

 The word Ebony ultimately derives from the Ancient Egyptian name for the tree, via Greek and Latin. It is also a name with musical connections, since the black keys on a piano were traditionally made of ebony wood. 

 The name Ebony has historically been particularly popular in the African-American community, and is the name of a long-running magazine focusing on news, culture and politics in the Black community.

Ebony

Pronounced like Owen, this was the name of several early Irish kings and saints, as well as a celebrated Ulster hero. Often spelled with two 'n's in Scotland, it has been Anglicized as Ewan, Ewen, Euan, Owen, Hugh, or Eugene.

Eoghan

Ektra

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.
 
Fawn would work as update to the now-dated Dawn, and is one of our favorite <a href="https://nameberry.com/list/479/middle-names-for-girls">middle names for girls</a>.

Fawn

Forrest is one of the earliest appealingly sylvan, outdoorsy choices, borne by newsman Sawyer, actor Whitaker, and football Hall of Famer Gregg. Forrest Gates was a character on "Buffy the Vampire Slayer."
 Forrest was steadily on the US popularity list until 2003, reaching a high of Number 175 in 1913, and then received a somewhat surprising blip after the release of "Forrest Gump." It started rebounding again in 2013, when it reentered the Top 1000 as one of the fastest-rising names on the list.
 Early Forrests were named in honor of Confederate General Nathan Bedford Forrest, head of a famous cavalry force, who advised 'Git there fuster with the mostest men.'

Forrest

Fox is one animal name backed by a longish tradition, and then popularized via the lead character Fox Mulder on X Files. Fox is simple, sleek, and a little bit wild, and could make an interesting middle name.
 It was reported that the TV character's first name was not a tribute to the Fox network which aired The X-Files, as often assumed; show creator Chris Carter said he had a childhood friend named Fox. Fox was one of the fastest-rising boys' names of 2016, perhaps because of the popularity of the X-Files revival.

If you find Grover too fusty and furry, this is a much cooler-sounding alternative. 

Grove

Hjörtur 

Juniper is a fresh-feeling nature name -- it's a small evergreen shrub -- with lots of energy. A new favorite of fashionable parents, Juniper joins such other tree and shrub names as Hazel, Acacia, and Willow. 
 
Juniper has an interesting variety of associations -- it's mentioned in the Old Testament, was used in Renaissance paintings to represent chastity, has berries used to flavor gin, and Juniper is the Saint of Comedy. A male St. Juniper was a follower of St. Francis of Assisi. 
 Goodnight Moon and The Runaway Bunny author Margaret Wise Brown sometimes used the pen name of Juniper Sage. And in the Junie P. Jones kids' books, Junie's full name is Juniper Beatrice. There also have been Junipers is cartoon series (The Life and Times of Juniper Lee) and comic strips as well.
 
The name got something of a hippieish vibe via the 1969 hit Donovan song, 'Jennifer Juniper.'
 
Juniper entered the U.S. Top 1000 for the first time in 2011 and has risen to the Top 150.

Juniper

The graceful, natural image of the verdant shade tree transcends any connection with President Johnson.
 A sturdy tree that can live for centuries, Linden was actually quite a popular boys' name from the 1930s to the 1960s--as was the presidential spelling Lyndon--but has now become unisex.

Linden

Manjola

Oak, a symbol of solidity, strength, and longevity, is joining Cedar and Pine as a viable name, one that would work especially well in the middle.
 If you'd prefer to take the longer route to the name, you can consider the surnames Oakes or Oakley.

Ossian, or Osian, from the Old Irish name Oisin, was the son of Finn in Irish legend that was transformed into a Scottish hero in the Ossianic poems of James Macpherson in the eighteenth century--which also popularlized Oscar, Fingal, Selma and Malvina.
 Downside: could be confused with Ocean.

Ossian

Sinopa

Tokala

Waverly, with its literary resonance and lilting three-syllable sound, could well become the next generation's successor to Kimberly. Its upper-crusty surname feel places it among the new stylish <a href="https://nameberry.com/baby-names/501/english-names-for-girls">English names for girls</a>, successors to Ashley and Whitney.
 Spelled Waverley, this is the title of Sir Walter Scott's popular 1814 novel, whose hero is a young English soldier named Edward Waverley (it's believed that Scott named the novel after the model of pen he used to write it). Spelled the more streamlined way, Waverly is the name of the daughter of Buttercup and Wesley in The Princess Bride and a memorable character in The Joy Luck Club, who was named by her Chinese mother for the San Francisco street on which the family lived.
 Waverly Place in Greenwich Village was named for the Scott novel in 1833--dropping the second 'e', and was the setting of the teen show The Wizards of Waverly Place, as well as Don Draper's bachelor pad in Mad Men, as well as a character on Friday Night Lights.

Waverly

undefined's list "Forest baby names" of 28 great name ideas: Aspen - Waverly!