Allsun \a-ll-sun\ as a girl's name is a variant of Alice (Old German) and Alison (Old German), and the meaning of Allsun is "noble, exalted".
The baby name Allsun sounds like Allisun and Alisun. Other similar baby names are Alleen, Allyn, Alyson, Allyson, Allison, Alisan, Alysoun, Alysan, Allysoun, Allisoun, Allcen, Alisoun and Allynn.