See also the related category greek.
Arethia is not popular as a baby name for girls. It is not in the top 1000 names.
Baby names that sound like Arethia include Aaradhya, Ammoretta, Arataki, Arethea, Arethusa (Latinized), Aretusa, Aryeta, Aryetta, Arythya, Iratzea, Iratzia, Orieta (Spanish), Orietta (Italian), Orithea, Orithia, Ortegia, Ortigia, Ortygia, Orythea, and Orythia.
† approx English pronunciation for Arethia: AA as in "odd (AA.D)" ; ER as in "hurt (HH.ER.T)" ; EH as in "ebb (EH.B)" ; TH as in "theme (TH.IY.M)" ; IY as in "eat (IY.T)" ; AH as in "mud (M.AH.D)"