Married in 1825, therefore probably born c 1804, probably in Rushen.

19 May 1805 MARGT CREBBIN d/o Wm Crebbin & Jane Waterson
or
06 Feb 1805 MARGT CREBBIN d/o John Crebbin & Jane Qualtrough
or
15 Dec 1801MARGARET CREBBIN d/o Thomas Crebbin & Ann Steitch
or maybe
11 Jan 1807 MARGT CREBBIN d/o Henry Crebbin & Margt Cooil

All info from IGI. You could look for these people in the 1841 census, and eliminate them 1 by 1, until hopefully you are left with one that fits.