Andreas Palaiologos
The Ottoman Sultan Mehmed II , who had conquered Constantinople in 1453 , died in 1481 , and his two sons Cem and Bayezid fought a civil war over who would succeed him . 
<triplet> Mehmed II <subj> Cem <obj> child <triplet> Cem <subj> Mehmed II <obj> father <subj> Bayezid <obj> sibling <triplet> Bayezid <subj> Mehmed II <obj> father <subj> Cem <obj> sibling