1) English girl name 
Dionna is an English name for girls. The meaning is `Valley` The name Dionna is most commonly given to American girls. What do they use in other countries? Deiondre The name sounds like: Deonna, Deionna, Dianna, Diona, Donna Similar names are: Fionna, Gionna, Yionna, Kionna, Rionna, Tionna