1841 census has Hugh CHRISTIAN 55 Tailor b. Isle of Man with Catharine CHRISTIAN 55 b.Isle of Man, at Ballagilley, Maughold, who could be Ewan/Hugh and Cath Moore, if this is where you got the dates from?
In 1851 Ballacreggin Maughold Catharine Christian widow aged 67, midwife, b. Maughold is living next door (or next household visited) to Emanuel Moore 63 Proprietor farming 3 acres, with wife Ann 58, and grandson John aged 5, all b. Maughold.
The household before Cath Christian's was that of John Moore, 28, farming 32 acres, with wife Cath 28 and children, but they were b.Bride.

A Hugh CHRISTIAN, Bil, was buried Maughold Jul 10 1844.

Who was the Evan / Ewan you are trying to connect up to them?

Sue