Robert de Thweng was the 1st lord of Kilton in right of his wife, and the first to use these arms identified as the arms of Thweng, Lords of Kilton. The following is from British History online https://www.british-history.ac.uk/vch/yorks/north/vol2/pp326-332#p18
In 1086 the Count of Mortain held 1 carucate in KILTON (Chilton, xi cent.; Kylton, xiv-xvi cent.) and 1½ carucates in Kilton Thorp, previously held by Uctred (fn. 59); at the same time 3 carucates in Kilton and 2½ carucates in Kilton Thorp were held of the king by Turchil. (fn. 60) By 1309 the overlordship had passed to the Percys of Kildale. (fn. 61)
Thweng. Argent a fesse gules between three popinjays vert, which arms were taken and borne by Lumley.
¶In early times Kilton gave a surname to a family, of whom Ilger de Kilton, an early benefactor to Guisborough, (fn. 62) was succeeded by his son William, (fn. 63) who was living in 1219. (fn. 64) William's heir was his niece Maud, (fn. 65) who married first Richard Hawtrey (de Alta Ripa), (fn. 66) by whom apparently she had no issue, and secondly Robert de Thweng, (fn. 67) who was her husband in January 1228–9. (fn. 68) Robert de Thweng was noted for his opposition to the foreign ecclesiastics sent to England in the reign of Henry III, and went on a successful mission to Rome for the redress of the matter. (fn. 69) He afterwards went on a crusade, whence he returned in 1242, (fn. 70) in which year he acknowledged that he had given the manor of Kilton to his son Marmaduke and his wife Lucy de Brus, (fn. 71) sister and co-heir of Peter de Brus. (fn. 72) Marmaduke was dead by 1284–5, when this manor passed by settlement to Marmaduke his second son by Lucy de Brus. (fn. 73) Marmaduke fought in the Scottish wars in the reign of Edward I, and after the battle of Stirling was put in charge of the castle there. (fn. 74) He was holding 5 carucates in Kilton in 1302–3 (fn. 75) and died in 1322–3, being succeeded by his son William, (fn. 76) whom two years previously he had enfeoffed of the manor. (fn. 77) William died without issue in 1340–1, his widow Katharine obtaining dower in November 1341 (fn. 78); his brother and heir Robert, parson of Warton in Kendale, Lancashire, (fn. 79) died before May 1344, and was succeeded on the death of Katharine by his brother Thomas, also a priest. (fn. 80) Thomas granted the reversion of Kilton to his nephew Marmaduke Lumley, (fn. 81) son of his sister Lucy who had married Sir Robert Lumley, (fn. 82) while some rights here were also assigned to his niece Elizabeth, wife of William de Botreaux, daughter of his sister Katharine. (fn. 83) Thomas died in June 1374. (fn. 84) Robert Lumley, son of Marmaduke, died a minor in the following December, (fn. 85) his brother and heir Ralph being also a minor. (fn. 86) In 1396 Elizabeth de Botreaux granted her rights in Kilton to this Ralph Lumley, Lord Lumley, her kinsman, (fn. 87) who, having taken part in the insurrection to restore Richard II, was slain in a skirmish at Cirencester in January 1399–1400 and attainted. (fn. 88) His eldest son Sir Thomas died a minor in 1400, (fn. 89) and the second son John, who succeeded, was restored in blood in 1412. (fn. 90) At his death in 1420 (fn. 91) his heir was his son Thomas. (fn. 92) Thomas became Lord Lumley in 1461 on the reversal of the attainder of his grandfather; he died in about 1480 and was succeeded by his son George. (fn. 93) Thomas son of George Lord Lumley died in the lifetime of his father, (fn. 94) who was therefore succeeded by Richard his grandson in 1507. (fn. 95) Richard Lumley died seised in 1510, (fn. 96) and his son John in 1524 settled the manor on his son George on his marriage with Jane daughter of Richard Knightley. (fn. 97) George was attainted and executed in 1538 for joining in the insurrections of 1536 and 1537 (fn. 98); John Lord Lumley then settled the estates on his grandson John son of George, (fn. 99) who in 1547 was also restored in blood. (fn. 100) In the reign of Elizabeth he was suspected of plotting in favour of Mary Queen of Scots, and was imprisoned in the Tower between 1570 and 1573. (fn. 101) He made conveyances of the manor at various dates, (fn. 102) but was still lord in 1607, (fn. 103) and died seised in 1609, succeeded by his nephew Splandrian Lloyd, son of his sister Barbara. (fn. 104)
