GraceCampbell's list "Cool But Unique Names" of 12 great name ideas: Grier - Sibella!

Cool But Unique Names

The spelling variation Greer may be much more popular, but this one might appeal to fans of Bryer and Brier. Given to 18 girls (and 8 boys) in the US in a recent year, Greer is used about five times more often.
 
Meaning "alert and watchful", it's one of the original androgynous movie star names, precursor to Drew, Glenn and Cameron, borne by Greer Garson who rose to fame in the 1940s.
 
Ultimately a Scottish surname derived from Gregory, this spelling was chosen by Brooke Shields for her second daughter back in 2006, sister to Rowan.

Grier

Although this is a legitimate name, most people would associate it with a line of Volkswagens -- you'd be better off choosing a Mercedes. 

Jetta

Haddie

Aven

Gracen

Berkley 

Copeland

Charleston

Daveney 

Lennox

Kensington

Sibella is derived from Sibyl or Sibylla, referring to female prophets or oracles in ancient Greek and Roman culture. The name carries an air of mysticism and ancient wisdom, while its melodic quality gives it an elegant, sophisticated sound. 

Sibella was occasionally used during the Middle Ages and the Renaissance, particularly among nobility, though it has always remained uncommon. The name experienced brief periods of minor popularity in the 19th century but remains rare today. No baby girls were named Sibella in the US last year. Its classical roots combined with its lyrical sound appeal to parents seeking a name with historical depth that maintains a distinctive quality. .