1. ROBERT¹ DE MORTIMER was born between 1177 and 7 April 1273, and died on 7 April 1287^[1, 1]. He married (AFJ-19) JOYCE LA ZOUCHE, daughter of (AFJ-13) William LA ZOUCHE, who was buried on 13 March 1289/90^{[1, 1]}.
Child:

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SIR WILLIAM2 LA ZOUCHE, m. (AMC-13) ALICE DE TOENI of Flamstead, Hertfordshire, England, United Kingdom, b. in 1284, d. on 1 Jan. 1324/5, daughter of (AMC-11) Ralph VII, Lord of Flamstead and Mary (Clarissa) (_____).

2. SIR WILLIAM² LA ZOUCHE (Robert de MORTIMER¹), son of (1) Robert¹ and (AFJ-19) Joyce (la ZOUCHE) DE MORTIMER, was born between 1191 and 1288, and died between 1205 and 1397. He married (AMC-13) ALICE DE TOENI of Flamstead, daughter of (AMC-11) Ralph VII, Lord of Flamstead and Mary (Clarissa) (_____), who was born in 1284, and died on 1 Jan. 1324/5. ^{[5, 5]}
Child:

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JOYCE3 LA ZOUCHE DE MORTIMER, m. (FM-4) JOHN DE BOTETOURTE, 2ND BARON BOTETOURTE, b. in 1318[1], d. in 1385[1], son of (FM-3) Thomas and (AJO-11) Joan (de SOMERY) DE BOTETOURTE.

3. JOYCE³ LA ZOUCHE DE MORTIMER (William², Robert¹), daughter of (2) Sir William² and (AMC-13) Alice (de TOENI) (DE BEAUCHAMP), was born between 1313 and 1326, and died between 1368 and 1435. She married (FM-4) JOHN DE BOTETOURTE, 2ND BARON BOTETOURTE, son of (FM-3) Thomas and (AJO-11) Joan (de SOMERY) DE BOTETOURTE, who was born in 1318^[1], and died in 1385^[1]. ^{[3, 4, 2, 6, 5]}
Child: See (FM-4) John de BOTETOURTE, 2nd Baron Botetourte