1. ROBERT¹ DE MORTAIN, EARL OF CORNWALL of Cornwall, England, United Kingdom was born in 1031, and died in 1095. He married (ABB-9) MAUD DE MONTGOMERY, daughter of (ABB-5) Roger, Earl of Shrewsbury and (KH-5) Mabel (TALVAS). ^{[3, 7]}
Half brother of William the Conqueror and a Companion at the battle of Hastings, 1066 ^[2]
Children:

+	2	i.	WILLIAM2 FITZ ROBERT.
+	3	ii.	EMMA DE MORTAIN, b. about 1042; d. in 1080; m. in 1080 (ALO-7) COUNT WILLIAM IV OF TOULOUSE of Toulouse, France, b. in 1040, d. in Holy Land, Israel in 1093, son of (ALO-6) Count Pons III and (VX-2) Almonde (of LA MARCHE).
+	4	iii.	AGNES DE MORTAIGNE of Mortagne, S-Mnch, France, b. about 1054; m. (ANN-1) ANDRE DE VITRÉ of Derby, Derbyshire, England, b. about 1044, d. in 1139[2].

2. WILLIAM² FITZ ROBERT (Robert de MORTAIN¹), son of (1) Robert¹, Earl of Cornwall and (ABB-9) Maud (de MONTGOMERY), was born between 1045 and 1091, and died between 1059 and 1201.
Child:

5

i.

BEATRIX3, m. (P-30) KING HENRY I "BEAUCLERC" OF ENGLAND, b. in Selby, Yorkshire, England in 1068, d. in Normandy, France on 2 Dec. 1135, son of (P-25) King William I the Conqueror and (U-17) Matilda (Maud) (of FLANDERS), Queen of England.

3. EMMA² DE MORTAIN (Robert¹), daughter of (1) Robert¹, Earl of Cornwall and (ABB-9) Maud (de MONTGOMERY), was born about 1042, and died in 1080^[2]. She married in 1080, (ALO-7) COUNT WILLIAM IV OF TOULOUSE of Toulouse, son of (ALO-6) Count Pons III and (VX-2) Almonde (of LA MARCHE), who was born in 1040, was christened in Toulouse, France, and died in 1093 in Holy Land. ^{[4, 1, 6, 8]}
Child: See (ALO-7) Count William IV of TOULOUSE
4. AGNES² DE MORTAIGNE (Robert¹) of Mortagne, daughter of (1) Robert¹, Earl of Cornwall and (ABB-9) Maud (de MONTGOMERY), was born about 1054, and died between 1059 and 1174. She married (ANN-1) ANDRE DE VITRÉ of Derby, who was born about 1044, and died in 1139^[2]. ^[5]
Children: See (ANN-1) Andre de VITRÉ