This extract from the material that Heywood has found will stop needless searching by us on this thread
"The years of birth of this John Mordaunt match the years for the John Mordaunt named by my correspondent Jimmy Burke, as the father of
George Mordant (sic) (abt. 1846 - 20th June 1928), born in Co. Wexford, served in the Royal Irish Constabulary. In the the 1901 census, however, he was working as a publican, living in house 51 in Mayors Walk, Waterford.
He married Bridget Nolan (abt. 1855 - 7th February, 1934), from Waterford, in about 1877. By the 1911 census he had left the pub trade and had moved down the road to house 13, Mayors Walk, and he was living on his RIC pension. According to the 1911 census they had had a total of 8 children but only three had survived. Clearly they had spent some years in Tipperary, where three of their children were born.
John Mordant (6th June 1878 (Ballybricken) - 15th June, 1899 (Mayor's Walk)). His birth and death were registered in Waterford.
Michael Mordant (13th September 1879 (Patrick Str.) - 23rd September, 1893 (51 Mayor's Walk)). His death was registered in Waterford.
Edward Mordant (8th November, 1881 - 21st October, 1907), birth registered in the Nenagh district, Co. Tipperary. In the 1901 census, age given as 19 years, he was still described as a scholar. His death was registered in Waterford.
Catherine Mordant (5th April, 1884 - 25th May, 1884). Her birth and death were registered in Thurles, Tipperary.
Patrick Mordant (1885 - 1885). His birth and death were registered in Thurles, Tipperary.
Another Patrick Mordant (20th January, 1888 - 28th May, 1960). birth registered in the Thurles district, Co. Tipperary. In the 1911 census he was described as a clerk, out of employment. He was possibly the only one of the eight who outlived both his parents. He married Catherine McGuire, (1905 - 16th September 1972) at St. Mary's, Ballygunner, on 18th October, 1933.
Bridget (Birdie) Mordant (b. 1934 - 27th February, 2015)
Ita Mordant (b. 1936 - 23rd September, 2004)
Mary Catherine Mordant (8th September, 1887 - 28th May, 1937), birth registered in the Thurles district, Co. Tipperary and died, unmarried in Waterford.
Another Michael Mordant (1st February, 1895 - 12th December, 1918), born in Waterford City. A Michael Mordaunt from Waterford, age given as 17 years, was working as a stable lad in Bershire, England, in the 1911 UK census. The death of a Michael Mordaunt, born abt. 1895/6 was registered in Naas in County Kildare in 1919. They may or may not be the same person.
All the above family of George Mordaunt are interred in St. Mary's, Ballygunner.
I am very grateful to my correspondent, Jimmie Burke, who kindly wrote to me in July 2022 with greater detail of George Mordant and his family which enabled me to place him, with some confidence, as the son of John Mordaunt of Ramstown."
All very interesting and topical for us at the moment, endlessly fascinating I would say for the family!