# Sir Thomas Southwell, 1st Baronet

Sir Thomas Southwell, 1st Baronet, of Castle Mattress (died 7 December 1680) was a high sheriff of County Kerry under the Protectorate.

## Birth and origins

Thomas was probably born at Castle Matrix, near Rathkeale, the fifth but only surviving son of Edmund Southwell and his wife Catherine Herbert. His father is called "Southwell of Castle Matrix". His grandfather, John Southwell of Barham, had come to Ireland from Suffolk during the reign of James I. His mother was a rich heiress, the only child of Garrett Herbert of Rathkeale.
Family tree :
| | | | | | | | | John Southwell of Barham | John Southwell of Barham | John Southwell of Barham | John Southwell of Barham | John Southwell of Barham | John Southwell of Barham | | | Garret Herbert of Rathkeale | Garret Herbert of Rathkeale | Garret Herbert of Rathkeale | Garret Herbert of Rathkeale | Garret Herbert of Rathkeale | Garret Herbert of Rathkeale |
| | | | | | | | | Edmund Southwell | Edmund Southwell | Edmund Southwell | Edmund Southwell | Edmund Southwell | Edmund Southwell | | | Catherine Herbert heiress | Catherine Herbert heiress | Catherine Herbert heiress | Catherine Herbert heiress | Catherine Herbert heiress | Catherine Herbert heiress | | | | | | |
| John Southwell d. 1642 | John Southwell d. 1642 | John Southwell d. 1642 | John Southwell d. 1642 | John Southwell d. 1642 | John Southwell d. 1642 | Ann Dowdall | Ann Dowdall | Ann Dowdall | Ann Dowdall | Ann Dowdall | Ann Dowdall | | | Thomas Southwell 1st Baronet d. 1681 | Thomas Southwell 1st Baronet d. 1681 | Thomas Southwell 1st Baronet d. 1681 | Thomas Southwell 1st Baronet d. 1681 | Thomas Southwell 1st Baronet d. 1681 | Thomas Southwell 1st Baronet d. 1681 | | | Elizabeth Starkey d. 1705 | Elizabeth Starkey d. 1705 | Elizabeth Starkey d. 1705 | Elizabeth Starkey d. 1705 | Elizabeth Starkey d. 1705 | Elizabeth Starkey d. 1705 |
| | | | | | | | | | | | | Richard Southwell d.v.p.* MP | Richard Southwell d.v.p.* MP | Richard Southwell d.v.p.* MP | Richard Southwell d.v.p.* MP | Richard Southwell d.v.p.* MP | Richard Southwell d.v.p.* MP | | | Elizabeth O'Brien d. 1688 | Elizabeth O'Brien d. 1688 | Elizabeth O'Brien d. 1688 | Elizabeth O'Brien d. 1688 | Elizabeth O'Brien d. 1688 | Elizabeth O'Brien d. 1688 |
| | | | | | | Thomas Southwell 1st Baron 1665–1720 | Thomas Southwell 1st Baron 1665–1720 | Thomas Southwell 1st Baron 1665–1720 | Thomas Southwell 1st Baron 1665–1720 | Thomas Southwell 1st Baron 1665–1720 | Thomas Southwell 1st Baron 1665–1720 | | | Meliora Coningsby | Meliora Coningsby | Meliora Coningsby | Meliora Coningsby | Meliora Coningsby | Meliora Coningsby | | | William Southwell 1669–1720 soldier | William Southwell 1669–1720 soldier | William Southwell 1669–1720 soldier | William Southwell 1669–1720 soldier | William Southwell 1669–1720 soldier | William Southwell 1669–1720 soldier |
| XXX | XXX | XXX | XXX | XXX | XXX | Subject of the article | Subject of the article | Subject of the article | Subject of the article | Subject of the article | Subject of the article | XXX | XXX | XXX | XXX | XXX | XXX | Baronets & Barons Southwell | Baronets & Barons Southwell | Baronets & Barons Southwell | Baronets & Barons Southwell | Baronets & Barons Southwell | Baronets & Barons Southwell |
* Thomas listed among his brothers
* He was the youngest of five brothers:
* John (died 1642), married Anne Dowdall, daughter of Elizabeth Dowdall
* William (died 1627), was killed at the Siege of Saint-Martin-de-Ré.
* Ralph (died 1627), was killed on the same occasion as William
* Edward, murdered in Holland
* Thomas (died 1680)
Nothing seems to be known of the sisters he probably had.

## Marriage and children

Sir Thomas Southwell married Elizabeth Starkey, daughter of William Starkey. She would survive him and die in September 1688.
Thomas and Elizabeth had one son:
* Richard Southwell, who married Elizabeth daughter of Murrough O'Brien, 1st Earl of Inchiquin
—and three daughters:
* Garthruid, married John Piggot of Kilfinny as his first wife
* Margaret, married ___ Piggott
* Joan, married Sir William Oughtred Courtenay of Powderham in Devonshire, Baronet

## Later life and death

Southwell 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 1st Baronet Southwell, of Castle Mattress in the Baronetage of Ireland, by Charles II. The castle mentioned in the territorial designation stands on the left bank of the River Deel, west of Rathkeale, and is also called Matrix or Matras.
Sir Thomas Southwell died in December 1680 or in May 1681 and was buried in Rathkeale. His eldest son, the member of parliament Richard Southwell, predeceased him and he was succeeded by his grandson Thomas, later 1st Baron, as the 2nd Baronet Southwell.