Brennan, John "Jack", of Dardenne Prairie, Missouri, died on Monday, June 3, 2013 at the age of 93. Loving husband of the late Dorothy M. Brennan; beloved son of the late Roy and Bonnie Brennan; devoted father of Maureen (Andrew Resetar) Brennan, John Brien (Yen) Brennan, and Patricia B-M (Joel Silverberg) Brennan; cherished grandmother of William Brennan and Sarah Mae Silverberg; also survived by nephews, other relatives, and friends. He is preceded in death by his brothers William and Robert Brennan. He was employed as a Mechanical Engineer at Western Electric and Lucent Technologies. He loved to tinker and hobbies included woodworking and auto mechanics. He was an avid golfer and enjoyed doing water color paintings of flowers and landscapes. Jack was a member of the St. Louis Museum of Arts and St. Louis Zoo. He enjoyed having season tickets to the St. Louis Symphony. Memorials may be made to Humane Society of Missouri.