Popularity today: #24
Style: Bell Tones, Last Names First, Nickname-Proof
Variants: Hailey, Hayley, Haylie, Hailee, Haleigh
Sisters: Bailey, Kelsey, Jordan, Sydney, Kayla
Brothers: Connor, Hunter, Kane, Logan, Dalton
This former surname became popular in Britain in the '60s thanks to child actress Hayley Mills. Americans didn't catch on until the '90s but then took to the name like mad. The spelling Hailey is equally popular, and creative variants abound.