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Where is the September, 1156 birthdate from? Britannica gives c. 1135. Rbraunwa 05:26, 2 February 2006 (UTC) reply

Several times it is mentioned that his step-father Boniface had hopes that "Manuel" who has imperial aspirations and claims. This would imply that Manuel was the eldest step-son and thus that either he was older than John, or that John did not exist in this line, and is some modern invention. Wjhonson ( talk) 16:54, 9 September 2010 (UTC) reply

Wow... through Ancestry research, just discovered I am a Direct descendant of Isaac!! — Preceding unsigned comment added by 161.12.34.126 ( talk) 11:45, 1 July 2015 (UTC) reply