Matteo - I like it, but I'm not so sure it'd work in Sweden, seeing as it's strictly Italian.
Sebastian, Victor - I'm getting a little tired of these names. They're just so dull and predictable to me.
Lucas - I really like this one! I may be biased, though, because the lead singer of my favorite band is called Lucas "Luke". lol but yeah, such a great name! Can I suggest the Lukas spelling, which would go better with your Swedish culture?
So in summary, your best bet out of these, imo, is Lucas / Lukas.
~~~~~
A real girl isn't perfect, and a perfect girl isn't real. ~Harry Styles
PNLs:
http://www.behindthename.com/pnl/148673http://www.behindthename.com/pnl/148673/117019