Hello Zebrakat,
Here is John Gillan, who married Ann McOubray, 1869. Kilmarnock, on the 1881. Census.
Address, Old Monkland, Lanark,
John Gillan, Head, Coal Miner, M. age 47 years, M. born Rutherglen, Lanark,
Ann Gillan, Wife, M. age 40 years, F. born Ireland,
Joseph Gillan, Son, Scholar, age 10 years, M. born Irvine, Ayr,
Lawrence Gillan, Son, Scholar, age 7 years, M. born Old Kilpatrick, Dunbarton,
Samuel Gillan, Son, age 4 years, M. born Rutherglen, Lanark,
James Gillan, Son, age 2 years, M. born Rutherglen, Lanark
Margaret Gillan, Mother, Widow, age 65 years, born Ireland,
James Gillan, Brother, Coal Miner, U. age 37 Years, M. born Rutherglen, Lanark.
Birth of Joseph Gillan, 5/Dec/1870. Irvine, Ayr, parents John Gillan, and Ann McCubrie.
Birth Of Lawrence Gillon, 22/Aug/1873. New Kilpatrick, Dunbarton, parents John Gillon, and Ann Mcubray.
Thes two births match with this 1881. census. So the census is most certainly the John Gillan, and his wife Ann Mcubray. The spelling of John, and Ann's, surnames are different on most documents.
Finally did you know that John, and Ann's, marriage is also recorded in the Catholic Church, Records, as this John Gillon, married Ann McCoubrough, 10/June/1869. St. Josephs, Roman Catholic Church. Kilmarnock. The exact date and place as the 1869 marriage on Scotlandspeople, Statuary Marriages.
Regards,
Jonn.