The name Allison was originally a Scottish surname meaning "son of Alan" or "son of Alexander," but it's now used as a diminutive of the name Alice, meaning "nobleness" or "nobility" in German. Allison entered the Social Security Administration's top 100 in 1974 and remained that way until 2022, when it fell to No. 101 (though it returned to No. 100 in 2023). Other spellings include Alison, Alisson and Allyson, all of which cracked the top 1,000 in 2023.