Matthew Kantakouzenos [SEP] date of birth
Matthew Kantakouzenos
Matthew Asen Kantakouzenos or Cantacuzenus (Greek: Ματθαίος Ασάνης Καντακουζηνός, "Matthaios Asanēs Kantakouzēnos", Bulgarian: Матей Асен Кантакузин, "Matey Asen Kantakuzin" c. 1325 – 15 June 1383) was Byzantine Emperor from 1353 to 1357.
Life.
Matthew Asanes Kantakouzenos was the son of Emperor John VI Kantakouzenos and Irene Asanina. In return for the support he gave to his father during his struggle with John V Palaiologos, he was given part of Thrace as an appanage in 1347, and was proclaimed joint
ceased being considered an Empress. The date of her death was not recorded.
Marriage.
The "History" of John VI Kantakouzenos records the marriage of Irene to Matthew Kantakouzenos in 1340. 
The couple had at least five children:
- John Kantakouzenos (c. 1342 – after 1361), "despotēs".
- Demetrios I Kantakouzenos (c. 1343 – 1383), "sebastokratōr". Briefly ruled the Despotate of Morea.
- Theodora Kantakouzene. Eldest daughter. The "History" records her