In addition, Sia is a variant form of the Arabic Zia.
Sia is not popular as a baby girl name. It is not in the top 1000 names.
Baby names that sound like Sia include Sache, Sae, Saeg, Saege, Saesha, Sage (English), Saige (English), Sake, Sao, Sash, Sashae, Sask, Say, Saye, Sayge, Sea, Sha (English), Shae (English), Shai, and Shak.
† approx English pronunciation for Sia: S as in "see (S.IY)" ; ZH as in "beige (B.EY.ZH" ; AH as in "mud (M.AH.D)"