1. ROBERT¹ DE MORTAIN, EARL OF CORNWALL of Cornwall, England, United Kingdom was born in 1031, and died in 1095. He married (ACY-9) MAUD DE MONTGOMERY, daughter of (ACY-5) Roger, Earl of Shrewsbury and (LP-5) Mabel (TALVAS). ^{[2, 6]}
Half brother of William the Conqueror and a Companion at the battle of Hastings, 1066^[1]
Children:

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

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

5

i.

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

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