Thomas St Lawrence, 13th Baron Howth
He was born in 1659, eldest son of William St Lawrence, 12th Baron Howth, and Elizabeth Fitzwilliam. He was only twelve when his father died, and during his minority he was under the guardianship of Thomas Butler, 6th Earl of Ossory, who had been his father's closest friend.
After the Revolution of 1688, Lord Howth seems to have been determined at all costs to back the winning side. At first he supported James II and sat in the Patriot Parliament of 1689; yet after the failure of the Jacobite cause he quickly transferred his loyalty to William III, sitting in the Parliament of 1692, and signing the Declaration of Loyalty to the person and government of the King in 1697. A family tradition that he entertained William in Howth Castle is probably unfounded.
Despite his political opportunism, he seems to have been highly esteemed by those who knew him. His closest friends, the Grattan family, were also close friends of Jonathan Swift (who later became friendly with Howth's eldest son). He built a quay to carry coal to Howth lighthouse, at considerable cost to himself. He was also noted for charity, and left a large sum in his will for the relief of the poor of the parish of Howth. Elrington Ball quotes an elegy on his death in 1727 which pays tribute to his virtues:
"Behold this stone whose vault contains
More precious dust than India's veins,
For honour's sake then shed a tear,
Since honour's self lies buried here."
- William St Lawrence, 14th Baron Howth;
- Henry, who died in 1736, killed in a notorious duel with Hamilton Gorges, a brother of William's wife Lucy;
- Elizabeth, who married firstly Edward Rice and secondly Dominick Quin, and by her first marriage had one daughter-
- Mary, who married firstly Colonel Thomas Degge, and secondly Arthur Blennerhassett.
- Lodge, John and Archdall, Mervyn Peerage of Ireland Volume 3 J Moore Dublin 1789
- Ball F. Elrington History of Dublin 6 Volumes Alexander Thom and Co Dublin 1902-1920
- History of Dublin
- Lodge and Archdall Peerage of Ireland