Complex sentence: Her paternal grandparents were Hugh IX of Lusignan, Count of La Marche, and Mathilde Taillefer of Angoulême, and her maternal grandparents were Aymer Taillefer, Count of Angoulême and Alice of Courtenay.
Split into simpler sentences: Her paternal grandparents were Hugh IX of Lusignan, Count of La Marche, and Mathilde Taillefer of Angoulême. Her maternal grandparents were Aymer Taillefer, Count of Angoulême and Alice of Courtenay.