Complex sentence: Asquith is the younger son of the 2nd Earl of Oxford and Asquith by his wife the late Anne Palairet (d.1998), and a great-grandson of H.H. Asquith, a former British Prime Minister.
Split into simpler sentences: Asquith is the younger son of the 2nd Earl of Oxford and Asquith and Anne (born Palairet). He was a great-grandson of H.H. Asquith, the former British Prime Minister.