Hugh McWilliams, aged in his 60s, was driving a car which crashed on the Five Mile Straight in Draperstown on Friday.
His firm, H&A Mechanical Services, sponsors GAA club St Colm’s in Ballinascreen and Derry’s county GAA teams.
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Derry GAA said he was a “giant of generosity”.
It added: “He was unstinting in his support for county, club and community.
“The GAA was a way of life for Hugh and his untimely death will be a shock across the county.”
