Complex sentence: In 1445 he married Margarete of Savoy, widow of king Louis III of Naples and daughter of Duke Amadeus VIII of Savoy and had only son Philipp (14 July 1448--28 February 1508).
Split into simpler sentences: In 1445 he married Margarete of Savoy, widow of king Louis III of Naples and daughter of Duke Amadeus VIII of Savoy. With her, he had his only son, Philipp (14 July 1448--28 February 1508).