c. 1400, potentat, "a ruler, lord, prince, monarch; person who possesses independent power or sway," from Old French potentat and directly from Late Latin potentatus "a ruler," also "political power," from Latin potentatus "might, power, rule, dominion," from potentem (nominative potens) "powerful," from potis "powerful, able, capable; possible;" of persons, "better, preferable; chief, principal; strongest, foremost," from PIE root *poti- "powerful; lord."