Allisun is a form of Alice.
Allisun is also a form of the English, French, and Scottish Alison.
Allisun is not commonly used as a baby girl name. It is not in the top 1000 names. In 2012, within the family of girl names directly related to Allisun, Alice was the most popular.
Baby names that sound like Allisun include Alisen, Alison (English, French, and Scottish), Alisson (English), Alisun, Allison (English, French, and Scottish), Allyson (English), Alyson (English), Alceanah, Alceenah, Alceina, Alceinah, Alciena, Alcina (Italian), Alcinah, Alcmene, Alcyna, Alcynah, Alexande, Alexane, and Alexene (English).
† approx English pronunciation for Allisun: AE as in "at (AE.T)" ; L as in "lay (L.EY)" ; IH as in "it (IH.T)" ; S as in "see (S.IY)" ; AH as in "mud (M.AH.D)" ; N as in "knee (N.IY)"