Maud de Dunstanville
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- 1 Maud de Dunstanville [1]
- Robert de Beaumont
- 2 Mabel de Beaumont [1.1] d. Aft 1 May 1204
- 5th Earl of Devon William de Vernon Reviers d. Abt 8 Sep 1218
- 3 Mary de Vernon Reviers [1.1.1]
- Lord of Okehampton Robert Courtenay b. 1160 d. 26 Jul 1242
- 4 2nd Baron of Okehampton John Courtenay [1.1.1.1] b. 1218 d. 3 May 1274
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- 4 2nd Baron of Okehampton John Courtenay [1.1.1.1]
- 3 Mary de Vernon Reviers [1.1.1]
- 2 Mabel de Beaumont [1.1]