Beta \b(e)-ta\ as a girl's name is of Greek origin. Second letter of the Greek alphabet. Also a middle-European variant of Beth.
For more information, see also the related name Elizabeth.
Baby names that sound like Beta are Beata, Beda, Bet, Betha, Betta, Bett and Peta. Other similar baby names are Berta, Beba, Bea, Beea, Bena, Bera, Betia, Bets, Veta, Leta, Meta, Neta, Reta and Zeta.