If you are interested, George Gilroy Sr, son of Thomas Gilroy and Margaret Hunter, had a brother James, born about 1835, who married Jean Mackenzie, my 3rd cousin twice removed. I have some information about their descendants.
Thomas, age 30, quarrier was in the village of Leysmill, parish of Inverkeilor in the 1841 census with wife Margaret, 35 and children James, 5; Margaret, 4; and George, 1.