Allyson is a spelling variant of Alison, the medieval Norman French diminutive of Alice, which goes back to the Germanic Adalheidis and means "noble" or "of noble kind". The -lly- spelling has been especially common in the United States since the 1970s. Allyson ranked number 244 in 2000, peaked at number 234 in 2002 and has since drifted down to number 1139 in 2025.