Found one more entry Sancti
Just putting down this 1901 census entry. Lots fit but lots doesn't. We have at least three possible names from the list of children you have Aghadowey - Janet/Jessie, James, Andrew.
John Christie 41, gardener b. Maybole Ayrshire
Isabella Christie 38, b. Edinburgh
Janet Christie 8 b. Bothwell
Susan G Christie 6 b. Bothwell
James Christie 5 b. Bothwell
Andrew H Christie 2 b. Bothwell
Joseph Kirkpatrick 21, boarder
Wm Bannerman 22, boarder
Address: Greenrig St, Bothwell Lanarkshire
Found this family as a birth I found on general searches on SP is likely to be for them. The Susan above I think was born in 1894 in Lanarkshire and is indexed as
Susan Gilmour Christie - which I thought might connect with John's mother.
I cannot find an IGI birth in Maybole for this John. Also, can't easily see him in the earlier censuses except 1891, where he shows as Maybole born and a gardener at the Kirklands Lunatic Asylum in Bothwell, aged 29.
Monica
Added: The Isabella above I think is Isabella Henderson, born on 18 APR 1862 in Edinburgh to Andrew Henderson and Janet Beveridge. Isabella shows in the Bothwell 1891 census as a servant at the Kirklands Lunatic Asylum, where John Christie above was also working.