Cosgrove family search

This post is an edit/correction to an old post where I thought I discovered a link from the 1901/1911 Irish census records to a Catherine Cosgrove (widow) and her son Patrick Cosgrove of the townland Drumee in the Electoral Division of Newbliss, in the Civil Parish of Killeevan, in the Barony of Dartree in County Monaghan. Upon visiting the McGuigan family in Drumee, I discovered that the Catherine Cosgrove of Drumee had the maiden name BERRY and her son Patrick's father was William Cosgrove. My great grandmother Catherine Cosgrove's maiden name was MCCAUL (also a widow at the time) and her son Patrick's father was also Patrick and they were from Crossbane (spelled Crossbawn or Crossbaun in early records) which is two townlands distant from Drumee in the same ED, parish, and barony. There is a chance that William and Patrick were brothers as a William Cosgrove is listed as godfather to Patrick, Jr.'s siblings John, and my grandfather, Edward.

There is evidence of Cosgroves and McCauls living in Crossbane going back to the Tithe Applotment records of 1825. Of the first three children of Patrick Cosgrove and Catherine McCaul, two were born in Crossbane and one in the nearby townland of Corlougharoe which at the time was the estate of Richard Mayne. The family evidently moved over the border to County Fermanagh with the remaining children being born in not-too-distant Moleena or Farmhill. Their last child, Francis, was born in Lisnagore in County Monaghan so I believe the connection to family in the Killeevan Parish was strong. Of their 11 children, seven emigrated to the United States. I am searching for as much information as I can about those who stayed in Ireland including correct death records of the parents and information about more distant ancestors which is difficult due to the time period, the lack of digitized records, and the duplication and similarities in Irish forenames.

Any clues would be appreciated.