Hello Lois,
Needs the Marriage checked for misspelling of CAIN ?
from IGI
MARGT. DUGGAN
Spouse: Wm Cair
Marriage:
31 OCT 1812 Jurby, Isle Of Man,
from new family search,
name:John Cain
gender:Male
baptism/christening date:03 Jan 1813
baptism/christening place:PATRICK,ISLE OF MAN
father's name:Wm Cain
mother's name:Margaret Duggan
name:Wm Cain
gender:Male
baptism/christening date:17 Nov 1816
baptism/christening place:JURBY,ISLE OF MAN
father's name:Wm Cain
mother's name:Margt Duggan
name:Eliza Cain
gender:Female
baptism/christening date:13 Jun 1819
baptism/christening place:JURBY,ISLE OF MAN
father's name:Wm Cain
mother's name:Margaret Duggan
name:Ann Cain
gender:Female
baptism/christening date:25 Oct 1825
baptism/christening place:JURBY,ISLE OF MAN
father's name:Wm Cain
mother's name:Margt Duggan
www.familysearch.org/s/search/index/record-search-advanced#searchType=records&filtered=true&fed=true&collectionId=1708663&advanced=true&givenName=&surname=&eventType=any&eventLocation=&eventYearFrom=&eventYearTo=&relationship=parents&fatherFirst=William&fatherLast=Cain&motherFirst=Margaret&motherLast=Duggan
hope this helps,
Averil