Peter Francis Devlin died on the Belfast to Downpatrick Road
A man who died after he was struck by a car in County Down at the weekend had survived major brain surgery.
Martin Walls, 45, from Hilltown, was knocked down on the Dublin Road in Kilcoo.
He was one of three people to die on Northern Ireland's roads at the weekend.
A father of six was killed in a collision with a lorry in County Down and a Polish woman died in a motorcycle accident in north Belfast.
Mr Walls, a married man, had suffered brain cancer since 1994 and survived a series of major operations.
He died after he was hit by a car as he walked near Kilcoo at about 2215 GMT on Saturday. The driver of the car was taken to hospital with minor injuries.
Earlier on Saturday, Peter Francis Devlin, 63, a father of six from Kilcoo, was killed when his car was in collision with a lorry on the Belfast to Downpatrick Road at about 1330 GMT.
The driver of the lorry and his passenger were treated for shock in hospital.
On Sunday, a Polish woman who was 49-years-old was killed in a motorbike accident on the Hightown Road in Glengormley at 1100 BST.
Helena Anna Ciesielska was the pillion passenger on her husband's bike when the accident happened. She was married and had a son and daughter living in Poland.
Polish consul Jerome Mullen has offered his sympathy to the family.
Eleven people have been killed on Northern Ireland's roads so far this year.