There are only a few SAMPSONs listed on the LDS I.G.I. (Index of parish christenings & marriages before 1878ish).

SAMPSON, Anne d/o James SAMPSON & Jane chr 28 May 1749. Patrick, IOM
SAMPSON, Martin m Elizabeth CONDIN 21 Jul 1867, Malew, IOM
SUMPSON, Matthew m Catharine CANNELL 26 may 1772, Braddan, IOM
SAMPSON, Susanna m John CURPHEY 07 Jun 1760, Malew, IOM
SAMPSON, Veronica d/o Ja. SAMPSON & Jane MORETON chr 26 Feb 1769, Kirk Michael, IOM
SAMPSON, William s/o James SAMPSON & Alice CRAINE chr 18 Nov 1832, Douglas, St Mathews, IOM

After 1878 records were kept by the Govt as civil registrations. Contacting the Civil Registry
Finch Road
Douglas,
Isle of Man

with approximate dates might prove fruitful.