Where does “Alyson” come from?

Alyson is an English variant of Old French Alison, itself a diminutive form derived from Old French Aliz.

Ancestry of “Alyson”, step by step

StepLanguageWordMeaning
1EnglishAlison—
2Middle EnglishAlisoun—
3Old FrenchAlison—
4Old FrenchAliz—
5Proto-Basque-ali—
6Old High Germansazzo—
7Proto-Germanic*sittjan—
8Proto-Germanicsitjanąto sit
9Proto-Indo-Europeansḗd-to sit
Every word from Proto-Indo-European sḗd- →Every word from Proto-Germanic sitjaną →Every word from Proto-Germanic *sittjan →