When Robert E. Wilcox was born on 11 September 1840, in Kentucky, United States, his father, Josephus "Joseph" Wilcox, was 25 and his mother, Emily Holland, was 21. He married Diana Rhodes on 12 December 1869, in Jackson, Arkansas, United States. They were the parents of at least 4 sons. He lived in Arkansas, United States in 1870 and Benton Township, Howell, Missouri, United States for about 30 years. He died on 17 March 1916, at the age of 75.
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.