Allisun is an uncommon female given name of English origin, derived from the Old French name Alice, which itself comes from the Germanic name Adalheidis. The name Allisun is composed of the elements 'adale' meaning 'noble' and 'haid' meaning 'battle'. It was popular in medieval England and has seen a small resurgence in usage in recent years. The name Allisun is often associated with the Lewis Carroll character, Alice, from his novel "Alice's Adventures in Wonderland".
"Allisun peaked in popularity in 2007 with eight births that year. It had a resurgence from 1977 to 1996 with five births each decade."