William John French , At the time of Griffith's Valuation William John French's estate was in the parishes of Kilcooley and Ogulla, barony and county of Roscommon. In the 1870s William J. French of Blackhall, Navan, county Meath, owned 1,214 acres in county Roscommon. An estate of 1,220 acres belonging to Captain Peregrine Maitland French, third son of William John French was vested in the Congested Districts' Board on 1 Nov 1915.
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