Where does “Jamester” come from?

Jamester (English) comes from English James, from Middle English James, from Old French jamés, from Latin iam, from Proto-Indo-European Hyā́m.

Ancestry of “Jamester”, step by step

StepLanguageWordMeaning
1EnglishJamesThe twentieth book of the New Testament of the Bible, the general epistle of James
2Middle EnglishJamesJames the Greater or James the Less apostles
3Old Frenchjamésever; never
4Latiniamalready; now; anymore
5Proto-Indo-EuropeanHyā́m—
Every word from Proto-Indo-European Hyā́m →Every word from Latin iam →Every word from Old French jamés →