They're the third generation. Despite his attempted myth-building, the Donald is no more "self-made" than these two.
The empire he inherited from his father included 30,000 homes and apartments in New York.
I don't know a thing about these guys beyond that picture, but that picture screams "douchebags!" at me. The daughter Ivanka seems oddly well-grounded. I've heard good things about her.
I guess looks can be decieving...