Where does “Flanigan” come from?

Flanigan (English) comes from English Flanagan, from Irish Ó Flannagáin, from Irish flann, from Middle Irish flann, from Proto-Celtic wlannos, from Proto-Indo-European welh₃- — to hit, to strike.

Ancestry of “Flanigan”, step by step

StepLanguageWordMeaning
1EnglishFlanagan—
2IrishÓ Flannagáin—
3Irishflannblood-red; blood
4Middle Irishflannblood-red, crimson; blood
5Proto-Celticwlannos—
6Proto-Indo-Europeanwelh₃-to hit, to strike
Every word from Proto-Indo-European welh₃- →Every word from Proto-Celtic wlannos →Every word from Middle Irish flann →