Regards

google

ref

Middle English: from Old French regarder ‘to watch’, from re- ‘back’ (also expressing intensive force) + garder ‘to guard’.

wiktionary

ref

etymonline

ref

regards (n.)

as a closing in letters, "respects, good wishes," by 1775, from regard (n.) in the sense of "esteem, affection" (late 14c.).