Editing John III Doukas Vatatzes (section)

==Family==

John III Doukas Vatatzes married first [[Irene Lascarina]], the daughter of his predecessor Theodore I Laskaris in 1212.<ref name="books.google.com"/> They had one son, the future Theodore II Doukas Laskaris. Irene fell from a horse and was so badly injured that she was unable to have any more children.

Irene retired to a convent, taking the monastic name Eugenia, and died there in summer of 1240.<ref>{{citation|arxiv=2012.00976|title=Cometary records revise Eastern Mediterranean chronology around 1240 CE|year=2021|doi=10.1093/pasj/psaa114|last1=Murata|first1=Koji|last2=Ichikawa|first2=Kohei|last3=Fujii|first3=Yuri I.|last4=Hayakawa|first4=Hisashi|last5=Cheng|first5=Yongchao|last6=Kawamoto|first6=Yukiko|last7=Sano|first7=Hidetoshi|journal=Publications of the Astronomical Society of Japan|volume=73|issue=1 |pages=197–204}}</ref> John III married as his second wife [[Constance II of Hohenstaufen]],<ref name="books.google.com"/> an illegitimate daughter of Emperor [[Frederick II, Holy Roman Emperor|Frederick II]] by his mistress [[Bianca Lancia]]. They had no children.