As usual Patrick is named after either Michael's father or grandfather, perhaps an uncle, possibly Barney may be a name from the Walsh family. Nor within the 12 mi. Poor Law Union of Inishowen.
Griffith Valuation took place in Donegal 1857: www.askaboutireland.ie
These all have the same landlord, Parish and Townland as well as Poor Law Union Inishowen
so won't repeat these details:
Parish Desertegny, Townland Sharagore, PLU Inishowen, tenants of Rev. Wm. Know
3Aa William McLaughlin, house and land 5 acres 0 roods 38 perches; 3B land 2.1.5
4ABa Patrick, house, outbuildings and land 3.2.15
4B Daniel, house, outbuilding and sharing land with Ellen
4Bc Ellen house, outbuildings and sharing land 40.0.10 with Daniel
7 Michael, house, outbuilding and land 6.2.5
9Aa Philip, house, outbuildings and land 5.0.0 & 9B 6.2.4
14Aba William, house, outbuilding and land 8.2.10 sharing with; 14Bb Cecily house and outbuilding
16A Patrick, house, outbuilding land 20.0.15 & 12.3.10 shared with Michael and Sarah who each have their own houses and outbuilding
20Aa Michael, house, outbuilding and land 5.1.38 & 20B 4.3.0
23Aa Mark, house, outbuilding and land 6.2.16 23B land 11.0.6
Also note in the Townland of Liafin # 19B are also William McLaughlin, Owen McLaughlin as well as a Duffy and Doherty sharing land 26.3.30, tenants of George Harvey
There are no Walsh families in this Parish at the time of the Valuation, however, there are 82 in Donegal County.
Its possible the story is correct but with that many sons and changes made to the Land Act whereby you could ONLY pass on your lease to your eldest son unlike in the past where it would be divided between the sons as they married. They would need to find their futures somewhere else. Whisky or poteen was sold out of people's houses not just public houses.
Family in America would pass down stories but unlikely any family still there would. Check the 1901/1911 census to see who was still there. www.census.nationalarchives.ie
or even earlier
The Tithe Applotments 1823-1837 www:genealogy.nationalarchives.ie
Directories, commercial and residential:
Moville, Union of Inishowen 1894
Jas. McLaughlin, Main St. draper and tailor
Michael McLaughlin, National School, Urablreagh
Patrick McLaughlin, Main St. boot and shoe maker
No idea if related or not because of dates.www.rootsireland.ie
parish baptisms,marriages and some death. Civil Registration started 1864 and
these should be on www.familysearch
as well as 'roots.www.igp-web.com
+ county can be a good resource depending on the county
You should post this on the Donegal message board, as this board is for Fermanagh, NI. So unlikely to get a response unless its someone like me who isn't related.