Paul Davys, 1st Viscount Mount Cashell

Paul Davys, 1st Viscount Mount Cashell (c.1670–1716) was an Irish peer of the early eighteenth century.

He was the elder son of Sir John Davys and Anne Thelwall. His father was Secretary of State (Ireland), as was his grandfather Sir Paul Davys (died 1672)). The Davys family are recorded from Kill, County Kildare since the sixteenth century. Paul's uncle, whose heir he was, was Sir William Davys, Lord Chief Justice of Ireland.

Sir William, who died in 1687, had bought and improved St. Catherine's Park, Leixlip, which he wished to descend to his male heirs. At the same time he wished to provide for his stepdaughter Lady Catherine McCarthy, daughter of Callaghan, 3rd Earl of Clancarty (died 1676) and Lady Elizabeth FitzGerald, daughter of George FitzGerald, 16th Earl of Kildare, who remarried Davys in 1682. His will therefore contained the curious provision that whichever of his brother's sons should marry Catherine would inherit; Paul duly married her and inherited the estate.

With his inheritance, and enjoying the friendship of James Butler, 2nd Duke of Ormonde, to whom he admitted he owed his advancement, he decided to acquire a title. He chose Viscount Mount Cashell, which had previously been a Jacobite title given to Catherine's uncle Justin MacCarthy, who died in 1694. Accordingly, in 1706 Paul was created Viscount and Baron Mount Cashell.

Elrington Ball describes Mount Cashell as a young man of fashion, who found life in Dublin dull, and was fond of malicious gossip about his fellow peers. On the other hand, he describes Lady Mount Cashell as a woman greatly esteemed for religious devotion and charity.

Lord Mount Cashell died on 6 August 1716 and was buried in the family vault in St. Audoen's Church; his widow died in 1738, having outlived most of her children.

Ball refers to numerous children, most of whom died young; Belmore lists six children of whom three died young:

• William, died 1702
• Charles, died 1703
• James, 2nd Viscount Mount Cashell (1710–1719)
• Edward, 3rd Viscount Mount Cashell ( 1711–1736) on whose death the title became extinct
• Elizabeth, who married her cousin Justin MacCarthy
• Margaret (died 1778) who married James Barrymore, 5th Earl of Barrymore.

• Belmore p.24