Hello Averil. Just a thought regarding your "I can't find a Baptism for another John (son of Gilbert) UNLESS he was born after Mary 17 MAY 1767 and is not on the IGI...". [Burial: John Christian (Gilbert) 6 May 1774.]

I noticed in the Andreas records that they often have identifying names or places for common names in the parish like Christian, Teare, and Radcliffe, and the "Gilbert" might have come from several generations back, like the Corkill (Dick) family in Maughold.

Sue