1) English girl name 
Dalya is an English name for girls. The meaning is `flower, valley` The name Dalya is most commonly given to Belgian girls. (13 times more often than to American girls.) The name sounds like: Dalla, Daly, Dalyah, Daliya, Delya, Talya Similar names are: Aalya, Dalma, Damya, Danya, Darya, Datya, Daya, Dasya, Galya, Lalya