Dennis Michael Hasselmann Obituary
With sadness, we share the passing of Dennis Michael Hasselmann of Deer Park, New York. Dennis, born on June 9, 1945, passed away on June 30, 2026. Family and friends can send flowers and condolences in memory of the loved one. Leave a sympathy message to the family on the memorial page of Dennis Michael Hasselmann to pay them a last tribute.
He was predeceased by: his parents, Thomas William Hasselmann and Ann Hasselmann (Murphy); his brothers, Thomas (Louise) and Paul (Veronica); and his siblings-in-law, Michael Carr (Joanne), Christine Stahman (Frederick) and Eileen Jackson-Houlihan (James).
He is survived by: his wife Kathleen; his children, Kerry Ucci and Heather Merck; his sons-in-law, Rob Ucci and Kevin Merck; his stepgrandchildren, Kathryn Merck and William Merck; and his pet Carly.
