I have two connotations -
Rhea Silvia (the mother of
Romulus and
Remus, founders of Rome) and
Sylvia Plath. However I do not think it makes the name unuseable.
It is well known in lots of countries and I think it has a very pretty sound.
Silvia RebeccaSilvia AliceSilvia ThereseSilvia BryonySilvia JaneSilvia LorraineSilvia MagdalenaSilvia DianaSilvia LauraSilvia RachelSilvia Helen(a)
Any ideas?