Think you mean Everette J, son of Robert, not Robert.
Everett's other two brothers were Harry Franklin Wilgus b. July 1876 & Pemrose, b. date unknown.
If you are asking about Robert b.1846, son of Jacob Aaron Wilgus the number of brothers is much different, seven! They were Ephriam b. 1826, Ebe b. 1823, Joshua b. 1832, John(a twin)b.1834, Thomas L. b.1839, James L. b.1841,and William L.(my great grandfather b.1844. There were also girls in this family of 14. Jacob was a prolific man but even more amazing is that all of his children were by his one woman Maria Lynch Willgus b.1809 who lived to be 70 in spite of having 14 kids! Hope this helps.Gus Wilgus