1. SIR MARMADUKE¹ DE THWENGE has an unknown birthdate. He married (HS-5) LUCY DE BRUS, daughter of (HS-4) Peter II and (QN-3) Hawise (de LANCASTER).
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SIR ROBERT2 DE THWENGE, b. about 1260; d. about 1330.

2. SIR ROBERT² DE THWENGE (Marmaduke¹), son of (1) Sir Marmaduke¹ and (HS-5) Lucy (de BRUS), was born between 1218/9 and 1264/5, and died between 1278 and 1374/5. ^[2]
Child:

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LUCY3 DE THWENGE, b. on 24 March 1279[1]; d. on 8 Jan. 1347[1]; m. (ACH-2) NICHOLAS DE MEINILL, b. on 6 Dec. 1274[1], son of (ACH-1) Nicholas and Christina (_____) DE MEINILL.

3. LUCY³ DE THWENGE (Robert², Marmaduke¹), daughter of (2) Sir Robert², was born on 24 March 1279^[1], and died on 8 Jan. 1347^[1]. She married (ACH-2) NICHOLAS DE MEINILL, son of (ACH-1) Nicholas and Christina (_____) DE MEINILL, who was born on 6 Dec. 1274^[1]. ^{[1, 3]}
Child: See (ACH-2) Nicholas de MEINILL