See also the related form, the name Rashawna.
Ra is not often used as a baby girl name. It is not in the top 1000 names.
Baby names that sound like Ra include Era (Albanian and English), Rae (English, Hebrew, and Scandinavian), Ray (English), Raye (English), Ree (English), Rei (Japanese), Rey, Rhae, Rhi, Rho, Rhue, Rhye, Ri, Roo (English), Rou, Roux, Row, Rowe, Ru, and Rue (English).
† English pronunciation for Ra: R as in "race (R.EY.S)" ; AA as in "odd (AA.D)"