Marriage and progeny
Fortescue married twice:
Firstly to Anne Moore (d.1634), a daughter of Garret Moore, 1st Viscount Moore (ancestor of the Marquis of Drogheda). She died on 5 September 1634 and was buried in St. Patrick's Cathedral. By her he had 16 children (5 of whom died young) ten sons and six daughters including:
Chichester Fortescue (d.1641), of Donoughmore, County Down, eldest son and heir apparent, who succeeded his father as Member of Parliament for Charlemont. He trained as a lawyer at the Inner Temple and married Elizabeth Slingsby (d.1695), daughter of Sir William Slingsby, of Kippax in Yorkshire, who survived him and remarried to John Villiers, Viscount Purbeck, brother of George Villiers, Duke of Buckingham. By his first wife he had one child:
Elizabeth Fortescue (d.1705), who married Sir Richard Graham of Norton Conyers, near Ripon, and was the ancestress of Sir Reginald Graham (fl.1869). Elizabeth Fortescue was buried in the parish church of Warth. Her portrait was at Norton Conyers until the removal of the pictures in 1864, upon the sale of the mansion and estate, but the arms of Graham impaling Fortescue were still visible in 1869 above the entrance door.
He was a major in the army in Ireland and raised a company at his own expense in Lord Moore's regiment, and died in 1641 during the Siege of Drogheda, his father having shortly before resigned as Governor of Drogheda, leaving his two sons in the garrison.
John Fortescue (d.1642), 2nd son, killed by the rebels in Ireland in 1642, died unmarried.
Sir Thomas Fortescue (c.1620-1710), 3rd and eldest surviving son and heir, who held a commission in the royal army during the civil war, succeeded his father in his estates, and was the ancestor of Lord Clermont, and of his brother, Chichester Parkinson-Fortescue, 1st Baron Carlingford. He married twice, firstly to Sydney Kingsmill, daughter of Colonel William Kingsmill, son of Sir Francis Kingsmill, of Sidmonton, in Hampshire, by his wife Jane St. Leger, daughter of Sir Watham St. Leger, of Ulcombe in Kent. Secondly, he married Elizabeth Cary, a daughter of Sir Ferdinando Cary, grandson of the first Lord Hunsdon, by whom he had no issue. By his first wife he had two sons:
Chichester Fortescue;
William Fortescue;
Thomas Fortescue, M.P. and father of the first Viscount Clermont.
...... Fortescue, 4th son, killed in action in Ireland.
Roger Fortescue;
Garret Fortescue;
William Fortescue.
Lettice Fortescue, married to Sir Thomas Meredith, Knight;
Eleanor Fortescue, married firstly to Thomas Burnet, slain in the service of King Charles I; secondly to Colonel Brent Moore, of the family of Beneden (or Moor Place) in Kent;
Mary Fortescue;
Elizabeth Fortescue;
Alice Fortescue.
Secondly no later than 1637, to Eleanor Whitechurch, a daughter of Sir Marmaduke Whitechurch, Knight, and widow of John Symonds, Esquire, by whom he had no issue.
