It's been a favorite of mine for awhile, I love both Seraphina and Serafina though lately I've been leaning more towards Serafina due to it looking less frilly yet still very pretty. Plus I like the nn Fina. If I had four daughters right now, the fourth would be Serafina.
Seraphina/Serafina Eleonore/Elinor/Eleanor/etc.
Seraphina/Serafina Iris
Seraphina/Serafina Luna
Seraphina/Serafina Christine
Seraphina/Serafina June
Seraphina/Serafina Margaret
Seraphina/Serafina Therese/Theresa/Teresa/etc.