Thanks for the feedback.
I have some info on a number of John Christians, most of whom originated from Rushen. My own ancestor was christened in 1821 and married Agnes French (also frrom Kentraugh, Rushen), in Liverpool in 1841.
One of my false trails includes the descendants of John Christian (b abt. 1750) and Jane Costain (chr. Oct. 21, 1750, daughter of John Costain and Alice Gawne). I know that William, son of John & Jane, moved to Peel, married Elizabeth Quilliam (1789) and had a son John (1818) who married Eliza Oates (1830) in 1850. Is this in your line?
Bruce