Complex sentence: His uncle, Emperor Nicholas II of Russia, later created his mother Countess Brasova, and he was created Count Brasov, and legitimatized him, although he and his descendents would be excluded from the order of succession.
Split into simpler sentences: His uncle, Emperor Nicholas II of Russia, later created his mother Countess Brasova, and created him Count Brasov. Although he had been legitimatized, he and his descendents would be excluded from the order of succession.