William Harrington and Margaret Neville were married.
Before 1364 [his father] Nicholas Harrington of Hornby and [his mother] Isabel English were married.
Around 1373 William Harrington was born to Nicholas Harrington of Hornby and Isabel English at Farleton, Lancashire.
Before August 1397 [his father] Nicholas Harrington of Hornby and [his step-mother] Joan or Jennet Venables were married.
Around 1398 [his daughter] Helen Harrington was born to William Harrington and Margaret Neville. She married 1415 Richard Molyneux and had issue.
Around 1400 [his son] Thomas Harrington was born to William Harrington and Margaret Neville. He married 1419 Elizabeth Dacre, daughter of Thomas Dacre 6th Baron Dacre Gilsland and Philippa Neville Baroness Dacre of Gilsland, and had issue.
Before February 1404 [his father] Nicholas Harrington of Hornby died at Farleton, Lancashire.
In 1406 [his daughter] Isabel Harrington was born to William Harrington and Margaret Neville. She married before 29th August 1429 John Boteler of Bewsey and had issue.
In 1415 [his son-in-law] Richard Molyneux and [his daughter] Helen Harrington were married.
25th October 1415. At the Battle of Agincourt the English included: Louis Robbessart, Richard Beauchamp 13th Earl Warwick, William Botreaux 3rd Baron Botreaux, William Bourchier 1st Count of Eu, Thomas Rokeby, John Cornwall 1st Baron Fanhope 1st Baron Milbroke, Edward Courtenay, Ralph Cromwell 3rd Baron Cromwell, Thomas Dutton, Edmund Ferrers 6th Baron Ferrers of Chartley, Roger Fiennes, Henry Fitzhugh 3rd Baron Fitzhugh, John Grey, John Grey 1st Earl Tankerville, William Harrington as the King's Standard Bearer, Walter Hungerford 1st Baron Hungerford, Piers Legh (wounded), Alfred Longford, Thomas Montagu 1st Count Perche 4th Earl Salisbury, Thomas Morley 6th Baron Marshal 5th Baron Morley, John Rodney, Richard Scrope 3rd Baron Scrope of Bolton, Robert Strelley, James Tuchet 5th Baron Audley, 2nd Baron Tuchet, Robert Umfraville, Thomas West 2nd Baron West, Robert Willoughby 6th Baron Willoughby. Thomas Erpingham commanded the archers. Thomas Rempston was present. Thomas Strickland carried the Banner of St George.
Thomas Tunstall was killed.
The Welsh included: William ap Thomas "Blue Knight of Gwent" Herbert, Walter Sais, Roger Vaughan and his son Roger Vaughan. Owen Tudor is believed to have been present as a squire.
In 1416 William Harrington was appointed 123rd Knight of the Garter by King Henry V of England.
On 29th July 1418 the English forces commenced the Siege of Rouen. Robert Willoughby 6th Baron Willoughby fought. John Blount died. William Harrington, the King's Standard Bearer, was wounded.
Walter Hungerford 1st Baron Hungerford fought.
Henry Beaufort 2nd Earl Somerset was killed. John Beaufort 1st Duke of Somerset succeeded 3rd Earl Somerset.
In 1419 [his son] Thomas Harrington and [his daughter-in-law] Elizabeth Dacre were married.
On 16th June 1422 [his daughter] Helen Harrington died.
Before 29th August 1429 [his son-in-law] John Boteler of Bewsey and [his daughter] Isabel Harrington were married.
On 22nd February 1440 William Harrington died at Hornby Castle. He was buried at Urswick, Cumberland.