From Middle English, borrowed from Latin serēnus (“clear, cloudless, untroubled”).

Where is the word serene from?

Related to the Latin word serenus "peaceful, calm, clear," serene was originally used in English, as in Latin, to describe calm weather. By the mid 1600s, however, it was used figuratively to describe a calm, untroubled person as well.

Is Serenity a French name?

♀ Serenity

▲ as a girls' name is pronounced ser-REN-a-tee. It is of English and French origin, and the meaning of Serenity is "serene, calm". A virtue name. Also form of Serena.