Jon Brennan [Edit] By Sticky Facts Editorial StaffJon Brennan biography, ethnicity, religion, interesting facts, favorites, family, updates, childhood facts, information and more:Jon Brennan date of birth:July 30, 1974How old is Jon Brennan?51 Tags: birth day 30birth month julybirth year 1974 Suggested Posts Sylvester Stallone Facts Peter Dinklage Facts Ariana Grande Facts Madonna Facts James Gandolfini Facts Eminem Facts Chester Bennington Facts Selena Gomez Facts