de Thweng of Kilton Castle, Yorkshire, England
Robert de Thweng [a] b abt 1142, of East Riding, Yorkshire, England, d aft 1172. He md Emma de Lund abt 1163. She was b abt 1148, of Lund, East Riding, Yorkshire, England.
Child of Robert de Thweng and Emma de Lund was:
Child of Robert de Thweng and Maud de Kilton was:
Sir Marmarduke de Thweng [e], Lord of Kilton Castle, b abt 1225, of Kilton, North Riding, Yorkshire, England, d 1282-1284. He md Lucy de Brus abt 1242, daughter of Peter II de Brus, Lord of Skelton, and Hawise/Helwise de Lancaster.
Sir Robert de Thwenge [f], b abt 1255, of Kilton Castle, Kilton, North Riding, Yorkshire, England, d s.p.m. bef 1284. He md  Alice de Merlay bef Dec 1265, and  unidentified [g] aft 1267/68.
Child of Robert de Thwenge and unidentified second wife was:
Lucy de Thweng b 24 Mar 1278/79, Kilton Castle, Kilton, North Riding, Yorkshire, England, d 8 Jan 1346/47. She md William Latimer bef 20 Apr 1295. She was mistress of Sir Nicholas de Meinell, Lord Meinell, son of Sir Nicholas de Meinell, Lord Meinell, and Christine.Sir Marmaduke de Thweng, Lord Thweng, b abt 1258, of Kilton, North Riding, Yorkshire, England, d sh bef 26 Feb 1322/23. He md Isabel de Ros 1273, daughter of Sir William de Ros and Eustache Fitz Hugh.
Child of Marmaduke de Thweng and Isabel de Ros was:
Katherine de Thweng b abt 1312, of Kilton, North Riding, Yorkshire, England, d bef 28 May 1374. She md Sir Ralph Daubeney, Knight, bef 27 Jan 1345/46, son of Sir Helie Daubeney, Lord Daubeney, and Joan.
a. The earliest documented member of the Thweng(e) family, Robert de Thwenge, styled Robert Fitz Robert, is recorded in 1166 as holding a knight's fee of the old feoffment of William de Percy. Some believe the family origins were in Durham, with a relationship to the Fitz Marmadukes, Lords of Horden. It appears likely that their name came from Thwing, located in East Riding, Yorkshire.
b. Marmaduke de Thwenge acted as an attorney in a lawsuit in 1200 on behalf of his overlord, Piers de Brus, and in 1204, he was in custody, when his sureties paid a fine and pledged to restrain him from causing a tumult. He was apparently sympathetic to the northern barons against King John, as in 1217 he is mentioned as one of those who had made peace with the Crown. He often served as judge itinerant, and until August 1240 he acted as coroner in Yorkshire. The identity of his wife has evidently never been found in surviving records, nor is the date of his death known, but he was still living on 23 November 1234.
c. Robert accompanied Richard, Earl of Cornwall, on crusade in 1240, and in September of that year, as Richard's envoy, he went from Marseilles to the Emperor Frederick II to deliver information about the quarrel between the Earl and the papal legates who were attempting to stop the crusade. In 1245 his lands were seized by the Crown because he had attacked a clerk of the Archbishop of York in the royal hall of Windsor. The date of his death is not known, but he last appears on record 17 Jun 1246.
d. Wife of Robert de Thwenge was Maud, the widow of Richard de Autrey, and as niece and heir of William de Kilton, she is believed to be the daughter of Roger de Kilton. She brought to the Thwenges the manor and castle of Kilton, together with others lands in East Riding which had been held of the Percies.
e. Called a royal knight and banneret in 1260 and 1261, when he was granted robes by the King. Marmaduke went on pilgrimage to Santiago in 1262, and in 1264, he was summoned to join the King under arms and was captured at the battle of Lewes by Hugh le Despenser (to whom he owed ransom of 700 m). He was summoned for service against the Scots in 1258, and again in 1264 and 1283 against the Welsh. He was granted the right to hold markets and fairs in Thwing, Lund, and Coatham in 1257. In 1272 he obtained the manors of Danby, Brotton, and Skinningrove, as well as the town of Yarm in Yorkshire.
f. Robert de Thwenge was first son and heir of his father. He served in Wales for the Bishop of Durham in 1282. He died s.p.m. and was succeeded by his younger brother, Marmaduke, who became Lord Thwenge.
g. Robert is known to have married, before December 1265, Alice de Merlay, aged 8 years, of Morpeth, but as she died shortly before 7 February 1267/68, it is believed that she was likely not the mother of his daughter Lucy. One source states that Robert had a mistress, namely Matilda Hansard, by whom two sons were born, while another source states that Matilda was Robert's second wife and the mother of Lucy.
CP: Vol XII/1[735-739]; AR: Line 88[29-31].
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