The subsidiary titles of the Earl of Denbigh and Desmond are: Viscount Feilding (1620), Viscount Callan, of Callan in the County of Kilkenny (1622), Baron Feilding, of Newnham Paddocks in the County of Warwick (1620), Baron Feilding, of Lecagh in the County of Tipperary (1622), and Baron St Liz (1664).
William Feilding, 3rd Earl of Denbigh and 2nd Earl of Desmond (1640-1685)
Basil Feilding, 4th Earl of Denbigh and 3rd Earl of Desmond (1668-1717)
1608 – 28 November 1675) was the eldest son of William Feilding, 1st Earl of Denbigh.
At Uxbridge in 1645 Denbigh was one of the commissioners appointed to treat with the king, and he undertook a similar duty at Carisbrooke in 1647.
His titles devolved on his nephew William Feilding, 3rd Earl of Denbigh (1640–1685), son and heir of his brother George (created Baron Feilding of Lecaghe, Viscount Callan and earl of Desmond), and the earldom of Desmond has been held by his descendants in conjunction with the earldom of Denbigh.