See also the related category welsh.
Onllwyn is not popular as a baby name for boys. It is not listed within the top 1000 names.
Baby names that sound like Onllwyn include Anselm (English, German, and Spanish), Anselme (French), Anshelm (Scandinavian), Anslem (English), Anzelm (Polish), Amselmo (Spanish), Angelmo, Anselmey, Anselmi (Finnish), Anselmie, Anselmo (Italian, Spanish, and Portuguese), Anselmy, Anzelmo (Spanish), Amishalom (Hebrew), Angelino (Spanish), and Anselino (Spanish).
† English pronunciation for Onllwyn: AA as in "odd (AA.D)" ; N as in "knee (N.IY)" ; K as in "key (K.IY)" ; L as in "lay (L.EY)" ; W as in "we (W.IY)" ; IH as in "it (IH.T)"