Background
Southwell was the son of Edmund Southwell and Catherine Herbert.
Southwell was the son of Edmund Southwell and Catherine Herbert.
He served as High Sheriff of Kerry, High Sheriff of Clare and High Sheriff of County Limerick in 1654 under The Protectorate. On 4 August 1662 he was created a baronet, of Castle Mattress in the Baronetage of Ireland, by Charles World War II