Complex sentence: Her paternal grandparents were Walter FitzRoger de Pitres, Sheriff of Gloucester and Bertha de Balun of Bateden, a descendant of Hamelin de Balun, and her maternal grandparents were Bernard de Neufmarche, Lord of Brecon, and Nesta ferch Osbern.
Split into simpler sentences: Her paternal grandparents were Walter FitzRoger de Pitres, Sheriff of Gloucester and Bertha de Balun of Bateden, a descendant of Hamelin de Balun. Her maternal grandparents were Bernard de Neufmarche, Lord of Brecon, and Nesta ferch Osbern.