Acker is a surname name that has not seen much use to date, but given it's lush nature meaning (and the fact that it also means "friend" in Somerset slang) this could be a cute choice for parents looking for something fresh. An added bonus its link to English "Master of the Clarinet" Acker Bilk. The Dutch version, Akker, is also an option.

Acker

Ackley

Arlow

Arrden

Barkley

Bentley, a somewhat stuffy British surname, previously associated primarily with an incredibly expensive English car, has had a recent surge in popularity, thanks largely to the reality TV shows 16 and Pregnant and Teen Mom, with Bentley being the name of the son of breakout star Maci (another new favorite) Bookout.

Bentley

Birch is a rarely used nature name that calls to mind the lovely image of the tall, strong but graceful white-barked tree. 
 The best known bearer of the name is former high-ranking Democratic Senator Birch Evans Bayh, who carried the name of his father and was the principal Senate sponsor of the Equal Rights Amendment.
 The birch tree has many notable qualities and uses &mdash; including the making of furniture, paper, canoes, and drums, is considered the national tree of Russia (where it used to be worshiped as a goddess), the state tree of New Hampshire, and has spiritual significance in several cultures.

Birch

An English surname name, Bradley has a long history, dating way back to at least 1086, but as a first name it actually succeeded in the US before it reached England--though Dickens used it in his novel Our Mutual Friend. Bradley Cooper is one namesake.

Bradley

The only boy in the Brontë family; the name has a lonely Wuthering Heights/Jane Eyre feel.

Bramwell

Florrian

Stylish way to name your son after basketball great Walt -- though Walt is sounding fresh again too.

Frazier

Florence

The great American novelist sets this above many other surnames (and <a href="https://nameberry.com/list/329/nature-baby-names">nature names</a>, for that matter), but it's still an imposing and adventurous choice. Do nicknames Hawk or Thorne make it more approachable? The timid should stick with Nathaniel.

Hawthorne

Heywood

Harlow

Hawethorn

One of the new K boys' names that emerged in the nineties, it's now slipping off the radar. 

Kalen

Kingsley is a sophisticated Harry Potter name that entered the US Top 1000 in 2013.
 Writer Kingsley Amis is its most famous bearer. Cousin Kingston is also rising in popularity, thanks to Gwen Stefani and Gavin Rossdale's little boy.

Kingsley

Kozue

Lander is a name that straddles two trends. It's an er-ending surname name, ala Cooper and Carter. And it's also, more subtly, a green name, in the manner of Fielder or Reed.

Lander

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.
 Landon has been chosen for their sons by two musicians, American Idol finalist Josh Gracin and Blink drummer Travis Barker, whose middle name is Landon. It's also the name of soccer superstar Landon Donovan of the Los Angeles Galaxy.

Landon

More popular in its Layton spelling, Leighton is rising in popularity in the US for both sexes simultaneously, although this spelling remains more popular for girls for now – no doubt helped by actress Leighton Meester. Lleyton – as in Australian tennis star Lleyton Hewitt – is another, even more complicated, variant spelling.

Leighton

Marlow is a suave, unusual surname-name that was chosen by Celine designer Phoebe Philo for her older son. Caveat: it sounds just like the feminine Marlo and, with the addition of a final 'e', has begun to be used for girls.

Marlow

Oliver is an international star, ranking near the top of the charts in the US and throughout the English-speaking world, along with a host of European and Latin American countries, from Norway to Chile, Slovenia to Switzerland.
 
Long a popular choice in England, Australia and New Zealand, Oliver entered the list of Top 100 <a href="https://nameberry.com/boys-names">baby boy names</a> in the U.S. for the first time in 2009, but has already jumped to the top of the charts. Why? Because Oliver is energetic and good-natured, stylish but classic, with a meaning symbolizing peace and fruitfulness. 
 
Oliver derives from Olivier, the Norman French variation of the Ancient Germanic name Alfihar ("elf army") or the Old Norse Áleifr ("ancestor's relic"), from which comes Olaf. Olivier emerged as the dominant spelling for its associations with the Latin word oliva, meaning "olive tree."

Oliver was used as a given name in medieval England after the spread of the French epic poem ‘La Chanson de Roland,’ which features a character named Olivier. It lost favor after the seventeenth century rule of Oliver Cromwell, then was revived in the nineteenth century. 

Oliver's biggest boost in this country came from the hit book and movie Love Story, which also catapulted the name Jennifer to stardom. Notable namesakes range from Oliver Wendell Holmes to Oliver Hardy to Oliver Stone. In fiction, there is Oliver Twist, and Oliver is also a Harry Potter name.
 Oliver works particularly well with single-syllable surnames, as in Oliver Stone, North and Puck (son of Wolfgang). Other celebrities who have chosen Oliver include Bridget Fonda, Fred Savage, Stephen Stills, and Taylor Hawkes. 
 International forms include the French Olivier, the Spanish Olivero, and the Italian Oliviero.
 Parents considering Oliver for their sons might consider that with Olivia at the top of the charts for girls, there will be an awful lot of children with names starting with Oliv-.

Oliver

Orick

One of the first generation of surname names, along with Porter and Morgan, Parker's still one of the most appealing and remains firmly in the Top 100 for boys. About three times as many boys as girls get this occupational name. The association with Charlie Parker gives Parker itself a jazzy edge, and it also has a nature-related meaning. Rosie O'Donnell has a son named Parker.

Parker

With its gentle sounds and earthy vibes, the name Rowan feels like a fusion of different styles. A word name, a surname, and a gender-neutral name, Rowan is rustic but trendy, blending the vibes of both Owen and Oakley. 
Just as it’s hard to fit Rowan into one category, it’s equally difficult to identify one definitive root. It could be considered an Anglicized form of the Irish name Ruadhán, meaning “little redhead” and it was used as an English surname before it became a given name. 
Alternatively, it could be linked to the rowan tree, whose name derives from Old Norse and means “to redden.” In folklore and mythology, rowan trees are seen as a symbol of protection and of life, adding extra meaning to Rowan. 
 To complicate matters further, some scholars identify Rowan as a girls’ name, deriving from Rowena and Rhonwen, meaning “famous friend” or “white spear.” This gives it solid credentials as a unisex name and lends it a slightly more rugged vibe. 
What is certain, however, is that Rowan has quickly become a stylish choice, chosen for over 3000 boys every year. Once an obscure name in the US, it rapidly climbed the charts during the 2010s and has now entered the Top 100 Boy Names for the first time. 
Rowan is popular in the UK, Canada, and the Netherlands too, but even more so among Nameberry users, where it ranks in the <a href=“https://nameberry.com/popular-names/nameberry/boys/allNameberry Top 1000”> Nameberry Top 30.</a> 
The most prominent bearer of the name is probably Rowan Atkinson, the British comic actor of Blackadder and Mr Bean fame. Other namesakes include the former Archbishop of Canterbury, Rowan Douglas Williams, and the Australian swimmer, Rowan Crothers. Pokémon fans and Sarah J. Maas readers might recognize it too as the name of a character in both the game franchise and in the Throne of Glass series. 
Gentle but powerful, stylish but not oversaturated, Rowan may well continue to climb the charts, so if you love Rowan but want to stray from the trends, Ruan, Sylvan, Lorcan, Lennox, Wren and Sloan might inspire you.

Rowan

Rutley

Unfashionable surname, best left in the forest with Robin Hood and his Merry Men. 

Sherwood

Stockton

Rose and Briar are popular, and Hawthorn is cool – so why not the equally prickly Thorne? The E ending gives it a surnamey spin à la Hawthorne.

 Thorne Smith (born James Thorne) was a comic fantasy writer most noted for his Topper novels.

Thorne

Once aristocratic British surname yet to be revived.  Vince Vaughn recently gave his son the same double initials as his own when he named him Vernon Vaughn.

Vernon

geo5479's list "Boys Plant Names" of 32 great name ideas: Acker - Vernon!

Boys Plant Names

 Boys names that have to do with plants, flowers, etc