Complex sentence: In October 1945, he met Mary Margaret Brenchley (17 June 1924--30 September 2000), whom he married in June 1947 in London; they had two sons, Merrick and Felix (born 1953).
Split into simpler sentences: In October 1945, he met Mary Margaret Brenchley (17 June 1924--30 September 2000), whom he married in June 1947 in London. They had two sons, Merrick and Felix (born 1953).