Looking for Mcilwraith IN Ayrshire and OR Further Afield

Father and Mother James McIlwraith married Annie Brogan Coughtrie on 17-04-1936James was born on 16-04 1912 and died 07-10-1973 Annie was born on 01-05-1915 and died 01-01-2000. They lived at Gateside cottage and Riverview in Stair Ayrshire They are both buried in Prestwick cemetery. Grandfather was John McIlwraith and married Helen Davidson John died in 1950 and Helen died in 1954 or 1955. They lived in Dalmore Stair and are buried in Stair Cemetery. Greatgrandfather was James McIlwraith married Sarah Ross and lived at Laigh Dalmore Farm in Stair Ayrshire