1. SIR ROBERT¹ DE MUSCEGROS was born between 1172 and 1218, and died between 1186 and 29 Jan. 1254^[1]. He married (AAI-5) HAWISE MALET, daughter of (AAI-4) Sir William II and (DZ-7) Alice (BASSET), who died after 4 May 1287^[1].
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SIR JOHN2 DE MUSCEGROS, b. on 10 Aug. 1232; d. on 8 May 1275; m. (CU-2) CECILY AVENAL, d. before 10 Aug. 1301[1], daughter of (CU-1) Sir William.

2. SIR JOHN² DE MUSCEGROS (Robert¹), son of (1) Sir Robert¹ and (AAI-5) Hawise (MALET) (POYNTZ), was born on 10 Aug. 1232^[1], and died on 8 May 1275^[1]. He married (CU-2) CECILY AVENAL, daughter of (CU-1) Sir William, who died before 10 Aug. 1301^[1]. ^{[13, 7, 2]}
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SIR ROBERT3 DE MUSCEGROS, m. (PP-20) AGNES DE FERRERS, b. before 1255, d. after 9 May 1281, daughter of (PP-13) William, 5th Earl of Derby and (AHN-10) Lady Margaret (de QUINCY).

3. SIR ROBERT³ DE MUSCEGROS (John², Robert¹), son of (2) Sir John² and (CU-2) Cecily (AVENAL), was born between 1246 and 1262, and died between 1275 and 1372. He married (PP-20) AGNES DE FERRERS, daughter of (PP-13) William, 5th Earl of Derby and (AHN-10) Lady Margaret (de QUINCY), who was born before 1255, and died after 9 May 1281. ^{[3, 8, 6, 12]}
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HAWISE4 DE MUSCEGROS, b. on 21 Dec. 1276; d. after 23 June 1340; m. (1) between 2 Feb. 1298 and 31 Dec. 1300 (PP-21) SIR JOHN DE FERRERS, b. in Cardiff, Glamorgan, Wales, United Kingdom on 20 June 1271[10], d. in Gascony, France in Aug. 1312, son of (PP-17) Robert, 6th Earl of Derby and (FR-9) Alianore (de BOHUN); m. (2) before 1315 (IE-1) JOHN DE BURES.

4. HAWISE⁴ DE MUSCEGROS (Robert³, John², Robert¹), daughter of (3) Sir Robert³ and (PP-20) Agnes (de FERRERS), was born on 21 Dec. 1276^[10], and died after 23 June 1340^[11]. She married (1st) between 2 Feb. 1298 and 31 Dec. 1300, (PP-21) SIR JOHN DE FERRERS^[10], son of (PP-17) Robert, 6th Earl of Derby and (FR-9) Alianore (de BOHUN), who was born on 20 June 1271 in Cardiff^[10], and died in Aug. 1312 in Gascony. She married (2nd) before 1315, (IE-1) JOHN DE BURES^[10]. ^{[4, 9, 10, 6, 5, 12]}
Children of: Hawise⁴ de MUSCEGROS and Sir John de FERRERS: See (PP-21) Sir John de FERRERS

Child of: Hawise⁴ de MUSCEGROS and John de BURES: See (IE-1) John de BURES