Gary Frank Costanzo, 78, of Swansea, IL, born May 11, 1947, in Belleville, IL, died Monday, April 6, 2026, at Barnes-Jewish Hospital, St. Louis, MO.
Gary was preceded in death by his parents, Joseph C. Sr., and Margaret, nee Rohr, Costanzo; his brother, Joseph Costanzo, Jr.; and his brother-in-law, Cletus Thouvenot.
Surviving are his sister, Jeanette Thouvenot, two nephews and a niece, Brian (Mary) Thouvenot of Webster Groves, MO, Kevin (Tess) Thouvenot of Swansea, IL, and Lori Thouvenot of Swansea, IL; and several dear great-nieces, great-nephews, and cousins.
Condolences may be expressed to the family online at www.rennerfh.com.
Funeral: Private graveside services will be held at Green Mount Catholic Cemetery.
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