John III Doukas Vatatzes
The date of his birth is likewise unknown, but as he is called an "old man" in 1258, it must have been around the turn of the 13th century. Of his own family, it is known that he had one son, Constantine, who according to George Pachymeres was married to a daughter of the "sebastokrator" Isaac Doukas Vatatzes, brother of John III Doukas Vatatzes.