cbentleymakeup's list "Avant Garde Names" of 4 great name ideas: Stellan - Theone!

Avant Garde Names

Stellan is a strong, attractive, Scandinavian possible up-and-comer, known through actor Stellan Skarsgard, and his namesake, the son of Jennifer Connelly and Paul Bettany. Its trendy 'an' ending and the similarity in sound to the popular Kellen/Kellan make it all the more accessible.
 
While it sounds like it should be connected to stellar, it is more likely derived from the Old Norse stilling meaning "calm". Another possibility is from the Romanian Stelian and the Greek Stelios, meaning "pillar", or from the German stelle and stellen meaning "place, site" or "arrange". 
 
Nevertheless, it has a touch of celestial charm that is appealing to more and more American parents. In 2023, it was given to 121 boys (and 6 girls) — nearly double the number of Stellans born in the US a decade early.

Stellan

An unusual and straightforward name with an attractive Scandinavian accent; a royal name in Norway. 

Marit

A dated fifties surname name that led to the nickname SAndy.

Sanford

A solid, if somewhat serious Greek name. Theoni and Theona are variants. This might be a possibility if you're looking for an unusual route to Thea.