Location: County Durham, England
Surnames/tags: De Lumley, Lumley, Lord Lumley, Earls of Scarbrough Barons Lumley Earls of Scarbrough
SIR RALPH DE LUMLEY of Lumley, County Durham, England was born 1357 (he was 18 when he became heir to the estates after his older brother, Robert, died in 1375.) 
He was the son of Sir Marmaduke de Lumley of Great Lumley, County Durham, England, and his wife, Margaret Holand.
- Robert Lumley born bef. 1356 died before his father died in 1375
RALPH DE LUMLEY was Knighted on the 28th September, 1384, at the age of 27, and he was created a Baron (known as Lord Lumley) till his death in 30th Sept 1399.
Three years later he became Governor of Berwick-upon-Tweed in 1387. 
SIR RALPH DE LUMLEY married Eleanor Nevill, dau of John Nevill, 3rd LORD NEVILL DE RABY by his 1st wife, Maud PERCY, dau of Henry, LORD PERCY.  They had 3 sons, but the 1st (name not yet found) son died.
- First-born son died.
- John de Lumley b.? died 13 Apr 1421 at Baugé, France. He married Felicia Redman, dau of Sir Matthew REDMAN, Govenor of Berwick. John was the 2nd son but first surviving child of Sir Ralph de Lumley.
(See note below about title of Baron being "under attainment") However, because John de Lumley died on 13 Apr 1421 at Baugé, France. (See note below about title of Baron being "under attainder") it was his son, Sir Thomas de Lumley born 29th Sept 1408 at Morpeth who became the heir of his grandfather, Sir RALPH DE LUMLEY. 
- Marmaduke de Lumley
SIR RALPH DE LUMLEY died on the 30th September, 1399 during the reign of Richard II at the “Epiphany Rising” rebellion at Cirencester, Gloucestershire, England.
While attempting to seize Cirencester, Sir Ralph de Lumley was beheaded in a short but violent skirmish by the townsfolk, who, in turn, were later beheaded without a trial. 
However, after the accession of King Henry IV to the throne in late 1399, his title was placed under attainder due to his complicity in the murder of the Thomas of Woodstock, 1st Duke of Gloucester,  who was the seventh and youngest son of King Edward III. 
- Records of the Lumleys of Lumley Castle By Milner, Edith; Benham, Edith, 1874-1962 (https://archive.org/details/recordsoflumleys00miln/page/n4/mode/2up)
- History of the Lumleys: Cokayne’s Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, Or Dormant Vol. 5. (https://archive.org/details/completepeerage01cokagoog) L – M. Page 176.
- Oxford Dictionary of National Biography Vol 34 Llwyn - MacCartney (https://ia800508.us.archive.org/12/items/dictionarynatio57stepgoog/dictionarynatio57stepgoog.pdf)