User blog comment:Subject 16*/Assassin's Creed: Revelations - News/@comment-3984784-20110604165541/@comment-4369008-20110605011936

Ezio has to have 2 (or more) kids in order for Desmond Miles to receive him as a revelant match to Subject 16 at the start of AC2. If it was Ezio's son/daughter who has 2 children instead of Ezio, they would *most likely* get Ezio's son/daughter as the matching ancestor to Ezio.