In 1350 [his father] John Harrington 2nd Baron Harington and [his mother] Joan Bermingham were married. The marriage somewhat speculative?
In 1356 Robert Harrington 3rd Baron Harington was born to John Harrington 2nd Baron Harington and Joan Bermingham at Gleaston Castle.
In 1359 [his mother] Joan Bermingham died.
Around 1363 Isabella Countess Bedford and Soissons was granted custody of the paternal lands of Robert Harrington 3rd Baron Harington.
On 28th May 1363 [his father] John Harrington 2nd Baron Harington died at Gleaston Castle. Robert Harrington 3rd Baron Harington succeeded 3rd Baron Harington. Given his young age Robert Harrington 3rd Baron Harington became a ward of King Edward III of England who granted his wardship to his daughter Isabella Countess Bedford and Soissons and her husband Enguerrand de Coucy 1st Earl Bedford 1st Count Soissons.
Around 1376 [his daughter] Margaret Harrington was born to Robert Harrington 3rd Baron Harington and [his future wife] Isabel Loring Baroness Harington. She married Richard Huddlestone and had issue.
Around 1376 Robert Harrington 3rd Baron Harington and Alice Greystoke Baroness Harington were married. She by marriage Baroness Harington.
On 16th July 1377 King Richard II of England was crowned II King of England at Westminster Abbey by Archbishop Simon Sudbury.
Richard Fitzalan 9th Earl of Surrey 4th or 11th Earl of Arundel carried the Crown.
Guichard d'Angle 1st Earl Huntingdon was created 1st Earl Huntingdon for life.
John Mowbray 1st Earl Nottingham was created 1st Earl Nottingham.
Edward 2nd Duke of York 1st Duke Albemarle and Robert Harrington 3rd Baron Harington were knighted.
Roger Scales 4th Baron Scales attended.
Around 1383 Robert Harrington 3rd Baron Harington and Isabel Loring Baroness Harington were married. She by marriage Baroness Harington.
In 1384 [his son] John Harrington 4th Baron Harington was born to Robert Harrington 3rd Baron Harington and [his wife] Isabel Loring Baroness Harington. He married after 17th February 1461 Elizabeth Courtenay Baroness Bonville and Harington, daughter of Edward Courtenay 3rd or 12th Earl Devon and Maud Camoys Countess Devon.
Around 1386 [his daughter] Elizabeth Harrington was born to Robert Harrington 3rd Baron Harington and [his wife] Isabel Loring Baroness Harington. She married in or before 1405 John Stanley and had issue.
In 1390 [his son] William Harrington 5th Baron Harington was born to Robert Harrington 3rd Baron Harington and [his wife] Isabel Loring Baroness Harington at Gleaston Castle.
After 7th January 1400. The names of the lords who were present at the said declaration are as follows:
Henry, earl of Northumberland.
John, Lord Charlton.
Reginald, Lord Grey of Ruthin.
Thomas, Lord Furnivall.
Robert, Lord Scales.
John, Lord Beaumont.
William, Lord Ferrers of Groby.
Robert, Lord Harrington.
On 21st August 1400 [his wife] Isabel Loring Baroness Harington died.
In or before 1405 [his son-in-law] John Stanley and [his daughter] Elizabeth Harrington were married.
On 21st May 1406 Robert Harrington 3rd Baron Harington died at Aldingham Furness, Lancashire. [his son] John Harrington 4th Baron Harington succeeded 4th Baron Harington.
[his daughter] Anne Harrington was born to Robert Harrington 3rd Baron Harington and Isabel Loring Baroness Harington.