Complex sentence: Charles Ullman, after hearing of his wife's philandering, abandoned the family when Douglas was five years old and he and his older brother Robert were brought up by their mother, who gave them the family name Fairbanks, after her first husband.
Split into simpler sentences: Charles Ullman, after hearing of his wife's philandering, abandoned the family when Douglas was five years old. Douglas and his older brother Robert were brought up by their mother, who gave them the family name Fairbanks, after her first husband.