Stephen the Posthumous was the posthumous son of King Andrew II of Hungary by his third wife, Beatrice d'Este. He was regarded as bastard son of infidelity by his much older half-brothers, including King Béla IV of Hungary, and was not allowed to receive ducal revenues from Hungary to which he would have been entitled as son of a Hungarian king.

Albertino Morosini was a Venetian nobleman and statesman of the late 13th and early 14th centuries. He was elected governor (podestà) of the Republic of Pisa until his defeat and capture by the Genoese at the Battle of Meloria in 1284. He served in high offices in the Venetian Republic, including as bailo in Acre and Duke of Crete, where he confronted the Revolt of Alexios Kallergis. After 1290 was mostly active in the Kingdom of Hungary, where the son of his sister Tomasina became King Andrew III. Albertino entered the high Hungarian nobility, and was created Duke of Slavonia and Count of Požega, as well as being given a claim to the Hungarian succession. Nothing is known of him after November 1305, when he likely died.