All the old ae/ay middle names for girls are back--Kay, Fay, Mae/May, --and Rae is one of the coolest, used as such by celebrities as Mark Wahlberg and Daniel Baldwin. Even more popular in the celebrisphere is the jazzy Ray spelling: among those who used it as their daughters' middles are Bruce Willis, Dermot Mulroney, Maggie Gyllenhaal and Peter Sarsgaard, Uma Thurman and Lee Lee Sobieski.