It seems to me to be a foreign (foreign to me) form of
Lucy, and as such, I see no need for it. I usually like long girls' names that end in A, but in the case of
Lucia, it would seem to me that I'd be using a foreign form of
Lucy, and why would I do that? I love the name
Lucy as it is, so why would I use a foreign form? It would also seem that I felt that I had to dress
Lucy up, and I see no need to dress
Lucy up.
I picture a
Lucia to be Italian or Spanish. It doesn't at all fit in with
Genevieve and
Rosemary, but then, I don't think that sibsets have to "match", anyway.