Complex sentence: The eldest son of Frederick Conyngham, 7th Marquess Conyngham (1924-2009) by his wife, Eileen Wren Newsom, he attended Harrow School before studying at Harvard University.
Split into simpler sentences: The eldest son of Frederick Conyngham, 7th Marquess Conyngham (1924-2009) by his wife, Eileen Wren Newsom. He attended Harrow School before studying at Harvard University.