Eric Partridge says yeoman is "o.o.o." - 'of obscure origin' - but suggests it may be from 'young man' analogous to 'junker' in German. But of course he doesn't overlook possible links to Old Frisian ans Albanian! No reference to yew, so as they euphemistically say, "Forget yew!@"

BTW I ran into 'Fensibles' for the first time this Spring at Fort McHenry of Star Spangled Banner fame (musical justification for thread?) where a number of units of American defenders from Baltimore area were Fensibles.

Somehow the idea of English bowmen whose cloth yards (origin?) were the dominant military force in Europe before firearms being dependent on imported yew seems strange. If the exporting country/king had cut off the supply, the course of history would have been changed.