According to WJLA:
“The fastest rising name for girls is Briella, which jumped 394 spots to No. 497. Briella Calafiore stars in “Jerseylicious,” a reality TV show about battling stylists at a beauty salon in Green Brook, N.J. She’s also in a spinoff called “Glam Fairy.”
Brantley was the fastest rising name for boys, jumping 416 spots to No. 320. Brantley Gilbert is a singer who had a No. 1 country hit called "Country Must Be Country Wide".
See the top baby names list here.