While I definitely love Felicia way more than I do any Felicity-related name, I do love Felicitas (and Felicity, for that matter) as well. I think Felicity is more wearable these days, but Felicitas is more unusual and unexpected and I like how it seems to me like it has both bags of happy energy, yet at the same something very serious about it, in a noble, stately way. I think. It's beautiful. It also has a strongly Catholic vibe to me, which I'm not actually sure is in line with the reality and whether indeed most women with this name in the world are Catholic, but since I am Catholic myself, that association is a plus for me.
I prefer this spelling and pronunciation to Felicity. It’s really beautiful and I love the association! If I ever have girl twins, I’m making their middle names Perpetua and Felicitas.
― Anonymous User 3/3/2020
5
Felicitas is preferable to the annoying, babyish Felicity.