Arda is a simple gender-neutral name with several possible origins and meanings. As a Turkish name, it's usually used for males and means scepter. There is also a river in Turkey called the Arda.

The Hebrew name Arda means bronze.

And Arda may also be a variation of the English Arden, the name of a magical Shakespearean forest.

Arda

Aereth

Alicante

Almaigne

Alternia

Alvonia

Amestris

Anarres

Bahari

Byss

Caledonia is a rhythmic and alluring place name used by singer Shawn Colvin for her daughter.  It would make an interesting and apt choice for a girl with Scottish ancestry.

Caledonia

This name of the goddess of peace creates a lovely ideal. 

Concordia

Cascadia

Erilea

Exandria

Florin

Like Bethany and Shiloh, a meaningful biblical place-name. 

Gilead

Honali

A common Welsh name virtually unknown before the emergence of the charismatic Idris Elba, first on The Wire and then depicting Nelson Mandela in the acclaimed film.
Idris Hawr "the Giant" was a legendary seventh-century Welsh giant and magician who gave his name to a well-known mountain, "Idris's Fort".
Idris also exists in Arabic, meaning "to learn, study" and is the name of a prophet mentioned twice in the Quran. Idris Shah was a prominent Sufi writer.

Idris

Iraz

Khare

Krynn

In Greek mythology, Lethe was the name of one of the five rivers in Hades, the underworld. Lethe was also the name of the Greek spirit of forgetfulness and oblivion, with whom the river was often identified. 

Lethe

Laurania

Harley is a tough guy, while the rhyming Marley has a softer, gentler image. The name brings to mind reggae great Bob Marley, as well as the lovable dog from bestseller Marley and Me.
 
Marley is among the <a href="https://nameberry.com/unisex-names">top unisex names</a> in the US today.

Marley

In the Ossianic poems, Morven is the name of Fingal's kingdom. This name, borne by young Scottish actress Morven Christie, has a darkly intriguing quality to it.

Morven

Maru

Nirn

Panem

Pyrrhia

A rare unisex word/virtue name that is currently given to around 10 babies of each gender per year in the US. It could make for an unexpected route to bright, easygoing nickname Sol (or trendy nickname Ace). 
There is a male literary namesake in Solace Layfield, a character in Flannery O’Connor’s 1952 novel Wise Blood. Alanis Morrissette and Souleye used it as a middle name for their daughter, Onyx Solace, born in 2016.

Solace

A surprisingly modern word name, only recorded since the 20th century, Solaris is also the title of a 1961 science fiction novel by Polish author Stanisław Lem, which has been adapted for the big screen several times. An unexpected route to Sol or Solly as nicknames.


Solaris

Solis

Tamriel

Vanaheim

Xanth

Xylar

blueberrymuffinz's list "Names based on fictional locations" of 39 great name ideas: Arda - Xylar!

Names based on fictional locations

names based on places from books, tv, movies, video games, comics, etc. that don't actually exist but 
i think they sound really cool