Hi Mike,
as you will no doubt know through your research, the records for this period in Ireland can be patchy. This means that the further back we go the more we have to cast our net widely and accumulate so that the bits of evidence confirm each other. This is all the more important given the Irish naming tradition where it is quite possible to find successive generations in the same area with the same names [link to IrelandXO briefing].
To try and distinguish the different Henthorne families and establish potential ancestors, it would be good to have at hand:
- Siblings Adam, Thomas & Margaret - any details you may have on birth/baptism e.g. exact dates, parishes, parents, address, witnesses etc
- Names/other information on their parents - these may appear on baptism, migration, marriage and Canada Census records
- The names of Adam & Thomas’ boy children and Margaret’s girl children - this will help in trying to establish connections with other families through naming patterns
- Any occupations identified - these were often passed on through generations or shared in families
- Their religion
Meanwhile, I did take a quick look at the 1833 Tithe Applotment records for Cordegan and found this http://titheapplotmentbooks.nationalarchives.ie/search/tab/results.jsp?county=Cavan&parish=Larah&townland=Cordegin&search=Search
Henthorn, Thos, Cordegan, Sarah 1833
Henthorn, George, Cordegan 1833
In itself this doesn’t prove anything, but the population of Larah was small, and knowing their religion could help:
http://sites.rootsweb.com/~irlcav/drung.htm
1814 The protestant census reports 155 males, and 134 females in Drung. 68 males and 54 females in Larah. Total 411. The Parish register of Drung and Larah, Diocese of Kilmore, Drung Register of Bap. Aug.1785 to July 5, 1827. Mormans Film 0897355
Regards
Irene