Gossip Girl Fans?

Do we know Vanya's last name? You know, Dorata's husband? The doorman at the Van Der Woodsen's apartment?

I'm making a complete tag list for one of my dreamwidth accounts that includes fandoms and characters, and I can't seem to find a last name for Vanya...

I'm not sure if I'll actually post fics in the dreamwidth, or just use it as a link database to my fics (allowing people to search by fandom, character, or genre easily, with one entry per fic...) but probably the latter, so I'm making it as detailed as possible with tags for any character I may possibly write from my fandoms... so far I have the obvious ones for General Hospital, and all the main characters from The OC and One Tree Hill, and I'm working on Gossip Girl... I'm gonna try to get all the tags done tonight, except for corrections (like adding Vanya's last name if anyone knows it...)

So... can anyone help?