Complex sentence: Her father tried to find Brienne a suitor to wed, however, this was not easy, owing to Brienne's resistance and her ungainly appearance; consequently several offers of her hand in marriage were unsuccessful.
Split into simpler sentences: Her father tried to find Brienne a suitor to wed, however, this was not easy, owing to Brienne's resistance and her ungainly appearance. Consequently several offers of her hand in marriage were unsuccessful.