Clive, on Brian Lawson's personal family files he has Ewan KINRADE 1778-1862, and his wife Margaret CHRISTIAN 1778-1833 (will). "Margret Kinrade wife of Ewan Kinrade of the Cronk Garroo in the parish of Lezayre..".
There are a few options as to who this Margaret Christian b.1778 could have been, which presumably is why Brian didn't give her parents on his file.

Re. Cath Christian who married Thomas Bannan 1799, Carol can't look up their marriage entry until the 5th (public holiday so FHC closed yesterday).

Sue