Allis is a seldom used baby name for girls. It is not in the top 1000 names. In 2018, out of the group of girl names directly related to Allis, Alice was the most regularly used.
Baby names that sound like Allis include Alice (Czech, English, French, Italian, German, Portuguese, and Scandinavian), Alisse, Allyce (English), Alyce (English), Alys (English and Welsh), Alyse (English), Aalish (Gaelic), Aaltje (Dutch, Frisian, and German), Ajla (Slavic), Alaxis, Alcee (English), Alcie (English), Aleks (Russian), Ales (Czech), Alex (English), Alexes, Alique, Alis (Armenian, English, and Welsh), Alishay, and Alisz (Hungarian).
† English pronunciation for Allis: AE as in "at (AE.T)" ; L as in "lay (L.EY)" ; IH as in "it (IH.T)" ; S as in "see (S.IY)"