Stephen the Posthumous

Stephen the Posthumous (1236–1271) was the posthumous son of King Andrew II of Hungary and Beatrice d'Este, born after his mother fled King Béla IV. Béla, his half-brother, disputed his paternity and denied him a king's son's revenues.

Raised from 1243 at the Ferrara court of Marquis Azzo VII d'Este, he married Tomasina Morosini of Venice. His mother sought Venetian support for his claims, but Venice promised Béla in its 1244 peace treaty not to support them.

He styled himself Duke of Slavonia and pressed his Hungarian claims without success. He died in Venice after making his will on 10 April 1271. His son by Tomasina became King Andrew III, the last Árpád ruler.