My father was born in Cahirciveen, my 91 year old aunt still lives there. We have Sigerson relations, the Sigersons originated in Denmark.
Just checking the newspaper archives, there is a mention of Danny Sheehan who was married to a Curran returning to Cahirciveen from London with his two sons on a visit, it states that he was Sigerson's first cousin.
As I thought, your Sigersons were from Ballinaskelligs, just picked up a death notice for Thomas Sigerson father of James, it says that James was a cousin of Sigerson. this obit is 1968
That means that you have living relations, they used to own the Sigerson Arms Hotel in Ballinaskelligs, I know they still own the pub in Dungeagan.
Death of a Michael Sheehan, his father was Daniel, High Street, must be Danny above's brother, states a cousin of Sigerson.
Death notice 1971 John Joe, Sigerson's brother in London
PM me your email and I will forward you some of the articles
Brendan