Dennis J. Marek, 81, loving brother of Evelyn (the late George) Biard, the late Robert (Alice), Joseph (Marcia), Lorraine (Kenneth) Malecki, Dolores Marek, the late Audrey (the late James Carter) Marek, Jerome (Angela), and Richard (Marcia); beloved uncle of 19 nieces and nephews; great-uncle of many; and cherished son of the late John and the late Monica.

Dennis taught biology and was the department head at Holy Trinity High School in Chicago. Donations may be made to the charity of your choice.

Visitation, Sunday, Oct. 30 4 p.m. – 9 p.m. Funeral Prayers, Monday, Oct. 31 at 9:15 a.m. 4800 N. Austin Ave., Chicago, IL with Mass of Christian Burial to follow at 10 a.m. at St. Robert Bellarmine. Interment to follow at Maryhill Cemetery. For info, 773-736-2300 or www.lawrencefh.com .