quondam \KWAHN-duhm; KWAHN-dam\ (adjective) - Having been formerly; former; sometime.
"O, you my lord! By Mars his gauntlet, thanks!
Mock not that I affect th'untraded oath;
Your quondam wife swear still by Venus' glove.
She's well, but bade me not commend her to you." -- William Shakespeare, 'Troilus and Cressida'
Quondam comes from the Latin quondam, "formerly," from quom, "when."