Out of all the people I know named this (I have known 4), they all spell it
Sylvia (the youngest is nine and the oldest is 50ish, so it's great on all ages!). I think the spelling
Silvia is way prettier. When it's spelled
Sylvia it makes me want to say "SLY-via"! I think a
Silvia would get there named spelled more correctly then a
Sylvia anyway. I know a
Sylvia my age, and she says that everyone automatically spells it with an i.