Sir John Allen Johnson-Walsh, 1st Baronet (bapt.
[4] He was born John Allen Johnson (also spelled Johnston), the eldest son of Allen Johnson, of Kilternan in County Dublin, by his wife Olivia, only daughter of John Walsh, of Ballykilcavan in Queen's County.
He represented Baltinglass in the Irish House of Commons from 1784 to 1790 and was High Sheriff of Queen's County in 1792.
In 1808 he succeeded his maternal uncle Raphael Walsh (Dean of Dromore) to the estate of Ballykilcavan, and adopted the additional surname of Walsh by Royal Licence of 9 May 1809.
Their children included: He died at his seat in Ballykilcavan, aged 87.