The name Serenella is a girl's name of Italian origin meaning "serene". Serenella and is often added to lists like Names with Inspirational Meanings and discussed in our forums with posts like "Rate the Previous Signature!".
From the experts:
Both rhythmic and serene, Serenella is one of the Italian names for girls virtually unknown in the US but definitely usable. An unusual route to Ella as a short form?