I hadn't found a wife for Robert Oates Christian (Widr aged 65 in 1861).
This is from the 1851 census of Maughold, Ballure Road:
Robert Christian Hd marr 53 Engineer Annuitant b.Douglas
Jane Christian wife 51 b.Ramsey
Cathrine Christian Daur U 27 Employed at home b.Ramsey
Thomas Christian Son U 22 Sailor b.London
Jane Christian Daur U 19 Employed at home b.France
Howard Christian Son 12 Scholar b.France
Matthew Christian Son 11 Scholar b.France
Cathrine Corlett 22 Visitor U Dressmaker b.Ramsey
Ann Clague servant U 20 House servant b.Lezayre
Cathrine Martin servant 18 House servant b.Lezayre.

The IGI has an extracted entry for JOHN WILLIAM CHRISTIAN Christening: 14 MAY 1826 Ramsey, Isle Of Man, Father: ROBERT OATS CHRISTIAN, Mother: JANE SAYLE.
- Which is a bit of luck because Ramsey records often didn't include the mother's surname.

Robert Oates Christian & Jane Sayle married in Maughold on 10 May 1820 (from the parish register).

Jane CHRISTIAN aged 56, Ballure Rd., was buried in Maughold on 11 Nov 1854.

Sue