At the Cromwellian conquest of Ireland the Clontarf estate was given to Captain John Blackwell, who afterwards transferred his interest to John Vernon, a younger son of the Vernon family of Sudbury Hall in Derbyshire.
The Clontarf estate was given to Captain John Blackwell. This was at the Cromwellian conquest of Ireland. Captain John Blackwell afterwards transferred his interest to John Vernon in Derbyshire. John Vernon was a younger son of the Vernon family of Sudbury Hall.