Where does “Liam” come from?

Liam (Irish) comes from English Uilliam, from English william, from Middle English William, from Anglo-Norman Willame, from Old High German Willahelm, from Old High German helm, from Proto-West Germanic helm, from Proto-Germanic helmaz — to pierce, strike; to stick; prick; stab.

Ancestry of “Liam”, step by step

StepLanguageWordMeaning
1EnglishUilliam
2Englishwilliamradiotelephony clear-code word for the letter W
3Middle EnglishWilliam
4Anglo-NormanWillame
5Old High GermanWillahelmWilliam
6Old High Germanhelmhelmet
7Proto-West Germanichelmhelmet
8Proto-Germanichelmazhelmet
9Proto-Germanichalmazhalm; stem; stalk; straw; hay
10Proto-Indo-Europeanḱolh₂mosstalk
11Proto-Indo-Europeanḱelh₂-to pierce, strike; to stick; prick; stab

Words derived from “Liam

Every word from Proto-Indo-European ḱelh₂-Every word from Proto-Indo-European ḱolh₂mosEvery word from Proto-Germanic halmaz