Where does “Billiam” come from?

Billiam (English) comes from English Bill, from Middle English bill, from Old English bil, from Frankish billi, from Proto-Germanic bilją, from Proto-Germanic harjaz, from Proto-Indo-European kóryos, from Proto-Indo-European ḱer- — army.

Ancestry of “Billiam”, step by step

Billiam traces back through two separate lines of ancestry.

via English Bill

StepLanguageWordMeaning
1EnglishBillA nickname for the British constabulary. Often called "The Bill" or "Old Bill"
2Middle Englishbill
3Old Englishbila kind of sword or other bladed weapon,...
4Frankishbilli
5Proto-Germanicbiljąa cutting implement; blade; axe; sword; spike;...
6Proto-Germanicharjazarmy; army leader; commander; warrior
7Proto-Indo-Europeankóryoswar; troops; army; war, troops
8Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
9Proto-Indo-Europeankr̥-to turn, to bend
10Proto-Indo-Europeanker-army

via English william

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