[ 4 syll. se-re-ni-ty, ser-en-ity ] The baby girl name Serenity is pronounced Seh-REH-Nay-Tiy- †. Serenity's language of origin is Latin and English. It is predominantly used in the English language. English origin: It is from serenity ; serenus meaning 'serene, clear, bright'. The name is derived from the common English word, which is itself of Latin origin. In addition, Serenity is a variation of Serena (English, German, and Italian).