.... Doukas Komnenos Angelos, of Thessaly

Ioannes & his wife had [six] children:

-http://fmg.ac/Projects/MedLands/THESSALONIKI.htm#dauIoannesBetTodor...

7. [daughter . Pachymeres records the betrothal of "Bulgariæ rex Terteres…suo filio Osphentisthlabo" to "Ioannis sebastocratoris patris…Michaelis…filia"[91]. The identity of this daughter is not clear, although she was probably one of the other daughters shown here and identified in other sources.

Betrothed ([1284]) to TODOR SVETOSLAV of the Bulgarians, son of GEORGI Terter Tsar of the Bulgarians & his first wife Maria --- (-1321). He succeeded in 1300 as TODOR SVETOSLAV Tsar of the Bulgarians.

or possible daughter of John Synadenos, megas stratopedarches by wiki