Diane Costello
January 13, 1952 – July 27, 2026
Age 74
Diane Costello of Thorold, Ontario, died on July 27, 2026, at the age of 74. She was predeceased by her parents, Roy and Corrine Calder, and her sister Sharon Swartz. Survivors include her children Jeffrey (Erin) and Kimberly Costello (Chap); her sisters Carolyn Iafrate (Piero) and Debbie Morrison (Al); her brother-in-law Mark Swartz, as well as numerous nieces, nephews, extended family members and friends. A celebration of her life took place on Thursday, August 6, 2026, from 1:00 p.m. to 3:30 p.m. at Pleasantview Funeral Home, 2000 Merrittville Highway, Thorold, ON L0S1E6. In lieu of flowers, the family requested donations to Cedar Row Farm Sanctuary or a charity of the donor’s choice.
