When Robert Stillman Wilcox was born on 6 April 1845, in Bath, Bath, Steuben, New York, United States, his father, Elijah Wilcox, was 35 and his mother, Sally Ann Cummings, was 32. He married Harriet Ann Goodman on 12 July 1871, in Chicago, Cook, Illinois, United States. They were the parents of at least 2 sons and 4 daughters. He lived in Chicago, Cook, Illinois, United States in 1880. He died on 11 April 1933, in Omaha, Douglas, Nebraska, United States, at the age of 88, and was buried in Omaha, Douglas, Nebraska, United States.
English (Yorkshire, Lancashire, and Flintshire): variant of Wilcock , with genitival or post-medieval excrescent -s. This form of the surname is based on the pronunciation.