My cousin is called Serrena and I think it is an underrated name. It is often confused with Serena even though they are pronounced completely differently. Serrena is pronounced ‘Sir - ren - a’ however Serena is pronounced ‘Sir - ree - na’ there is more emphasis on the e in Serena and there is more emphasis on the r in Serrena. So if you ever see the name Serrena written down, do not pronounce it like Serena. Vice - versa.