Sibling for Millicent - ideas please!

My husband wanted to go Calle [name_f]Millicent[/name_f] [name_f]Felicity[/name_f] at first so I’m sure he will like that suggestion! I like it too, with nn. fliss, but worry it may be a bit of a mismatch in eras?
Also love [name_f]Tess[/name_f] ”