Complex sentence: Although some genealogist claimed that he was the son of Edward of Portugal and Joana Manuel de Vilhena, great-granddaughter of Juan Manuel, Prince of Villena, Anselmo Braamcamp Freire dismisses such filiation and provides sufficient arguments against it.
Split into simpler sentences: Although some genealogist claimed that he was the son of Edward. King of Portugal and Joana Manuel de Vilhena, great-granddaughter of Juan Manuel, Prince of Villena, Anselmo Braamcamp Freire dismisses such filiation and provides sufficient arguments against it.