Allisun \a-lli-sun\ as a girl's name is a variant of Alice (Old German), and the meaning of Allisun is "noble, exalted".
The baby name Allisun sounds like Allsun, Allison, Allisoun and Alisun. Other similar baby names are Allyson, Allisunne, Allissa, Alliss, Allis, Alison, Alisan, Allisah, Allisa, Allysoun, Allisann, Allicen and Alisoun.