Complex sentence: He was married three times, firstly in 1934 to Elizabeth Wynkoop and then in 1954 to Barbara (Bobbie) Seale, daughter of theologist Morris S. Seale and sister of author and journalist Patrick Seale, with whom he had one son, Chadwick.
Split into simpler sentences: He was married three times, firstly in 1934 to Elizabeth Wynkoop. Then in 1954 he married Barbara (Bobbie) Seale, daughter of theologist Morris S. Seale and sister of author and journalist Patrick Seale, with whom he had one son, Chadwick.