Complex sentence: Whiting married Emily F. Owen, with whom he had 10 children, and his son, also named Justin Rice Whiting (1886--1965), was president of the Consumers Power Company from 1949 to 1959.
Split into simpler sentences: Whiting married Emily F. Owen, with whom he had 10 children. Their son, also named Justin Rice Whiting (1886--1965), was president of the Consumers Power Company from 1949 to 1959.