Ulrich II, Count of Celje
…Croatian House of Frankopan and a grand daughter of Francesco I da Carrara, lord of Padua. Little is known of his youth. On 20 April 1434 he married Kantakuzina Katarina Branković, daughter of Đurađ Branković, despot of Serbia., and the sister of Mara Branković. His influence in the affairs of the Kingdom of Hungary and the Holy…