Victor has a long history on DAYS. Some of the things that have happened with him:
Had an affair with Caroline Brady which produced Bo.
Justin Kyriakis who just came to town is his nephew.
He had a daughter Isabella who died of cancer and was married to John Black
He was married to Carly who will be coming back on the show in October, I think.
He was also married to Nicole Walker Dimera-- now married to EJ-- She tried to kill him.
There is a lot more, but this is all I can remember.