~1265, Thomas born in England.
1292 at Carlisle, Cumberland eyre: gaol delivery section. Thomas de Derwentwater called to warrant the acquittal of Richard de Laton … the said two, are tenants of Isabel de Forz, countess of Aumale … Of Thomas of Derwentwater and Richard of Laton they say that whatever they did on this they did by ignorance … the said Thomas of Derwentwater made fine for 20 shillings for the said offence and other offences … (S) Parliament Rolls, 2005.
5/4/1298, Confirmation … Sir Thomas de Ireby … Witnesses: Sir Thomas de Lucy, Sir Thomas de Derwentwater, Sir John de Lucy, … at Embelton. (S) UKNA.
9/21/1300, Lord Thomas de Derwentwater supplied his underlord, Alan de Brigham, with 30 men for the King’s next expedition into Scotland.
1300, Siege of Caerlaverock castle in Scotland.
1300, Thomas de Derwentwater proved his right to a market at his manor of Keswick on Saturday, and a fair for 5 days at the festival of Saint Mary Magdalen. (S) Magna Brit., V4, Cumberland, 1816, Parishes: Castle-Carrock.
1303, Thomas died.
4/29/1303, Order to the escheator on this side Trent to take into the king's hand the lands late of Thomas de Derwentwater, deceased, tenant in chief. (S) CFRs.
5/26/1303, Order to the escheator on this side Trent to deliver to John, son and heir of Thomas de Derewentwatre, tenant in chief as of the honour of Cokermuth, in the king's hand, the lands late of his said father, he having done homage ; saving to Margaret, late the wife of Thomas, her dower.
(S) The Lords and Lordships of the English West Marsh, Hall, 1986, Durham E-Thesis.
· 6/29/1265, Thomas de Derwentwater in the list of lords and knights coming back to the peace of King Henry.
· 1278, Agreement between Sir Thomas de Derwentwater and William de Threlkeld on Common rights. (S) UKNA.
Child of Thomas and Margaret:
i. John De Derwentwater, born ~1290 in England.
7/28/1314, IPM of Robert de Clifford. Westmoreland: … Ormesheved, held by John de Derewentwater, rendering 13s. 6d. (S) CIsPM.
9/11/1316, John de Derwentwater, the elder, enfeoffed John de Derwentwater, his younger brother, of the manor of Bolton, co. Westmoreland , and that the said John, the younger, continued his seisin thereof. (S) CCRs, 5/11/1323.
5/1/1317, John died, his brother John his heir.
5/12/1317, Commitment during pleasure to Robert de Leyburn of the keeping of all the lands late of John de Derewentwater, tenant in chief, in the king's hand by reason of the minority of John, brother and heir of the said John. (S) CFRs.
ii. John De Derwentwater (2955170), born ~1298 in England.