The story
- Medieval Latin · derived frompatronizāre“to lead a galley as patron”
- Old French · derived frompatroniser
- English todaypatronize
From patron + -ize (verb ending); or from Old French patroniser, from Medieval Latin patronizāre (“to lead a galley as patron”). Piecewise doublet of patternize.
Etymology from Wiktionary, CC BY-SA 4.0.