Drew is a bit of a GP for me for girls. For a long time, I loved the combo Cordelia Drew.
Let's see. For Drew, I'd pick something clearly feminine but not too frilly or flowery.
Drew Cordelia :P
Drew Adelaide
Drew Valerie
Drew Olivia
Drew Beatrice
Drew Edith
Drew Emily
Drew Caroline
Drew Joanna or Drew Johanna
Drew Margaret
Drew Justine
I also like Anneza's suggestion of Drusilla, nn Dru/Drew.