Guy.... Despite many fans having speculated it due to Sir Lancelot and Sir Galahad's relationship in Arthurian lore (where the latter is the son of the former), Takashi Iizuka has confirmed that Silver is not a descendant of Shadow.
WHY CREATOR OF SHADOW! YOU HATH RUINED MY THEORY!!!! GAHHHHHH sonic.wikia.com/wiki/Shadow_th… Go down to trivia..... and you find this crap.... I STILL WITH THINK IT'S TRUE IN MY OWN HEAD.