 Rambai muchinyora ndima iyi - John Kantakouzenos akaberekerwa muConstantinople, aiva mwanakomana waMichael Kantakouzenos, gavhuna weMorea; Donald Nicol anofungidzira kuti angave akaberekwa mushure mekufa kwababa vake uye akarerwa semwana mumwe chete. Kupfurikidza naamai vake Theodora Palaiologina Angelina, akanga ane ukama neimba yaitonga panguva iyoyo yePalaiologos. Aivewo nehukama nehumambo hweumambo kuburikidza nemukadzi wake Irene Asanina, hama yechipiri yaMambo Andronikos III Palaiologos. Kantakouzenos akava shamwari yepedyo yaAndronikos III uye akanga ari mumwe wevatsigiri vake vakuru mukurwisana kwaAndronikosmukurwisana nasekuru vake, Andronikos II Palaiologos. Pakutonga kwaAndronikos III muna 1328, akapiwa basa guru rokutarisira zvinhu uye akashanda somuranda mukuru munguva yose yokutonga kwake. Akagadzwa kuva mutongi womutsivi waAndronikos, John V aiva nemakore 9 okukura, pakafa mambo muna June 1341. 