Hello, My ancestors are related to yours through my 3rd great grandfather George Cassidy of Carraduffy. George was born in 1789 , married to Mary Johnston. His children included Hugh, my 2nd great grandfather born in 1810; George, born in 1815 (both immigrated to the U.S.); John, born 1819; Andrew; Catherine; William; and I believe,Margaret. The son John, born 1819, married Isabella Vance and one of his children was George, born about 1851, who married Isabella Allingham. George's son Edward was born in 1889...and there you go.
From this, I calculate that my 3rd great grandfather Hugh was uncle to his brother John's son George, b. 1851, and great uncle to Edward, b.1889.
I would be interested in learning any more about the families as I have just found the Cassidy connection in Carraduffy. Thanks. Marilee