How about Ryleigh? It has a similar sound but won't sound too much like yours and your daughter's names. The dog's only one, so she'll actually adapt to any name you choose. We just renamed a 9 month old from Billy to Dempsey - no problem!
Beth - mom to adopted rescues:
Dempsey: (8/27/2007) flashy brindle, docked and floppy
Potsie: 5 year old cream minipoo
Maddie: 5(?) year old westie/bichon(?)