John (of Tanfield Etc) 1st Lord Marmion
- Bef 1322(
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- 1 John (of Tanfield Etc) 1st Lord Marmion [1] d. Bef 7 May 1322
- Isabel d. Yes, date unknown
- 2 John (of Tanfield Etc) 2nd Baron Marnion [1.1] b. Abt 1292 d. 30 Apr 1335
- Maud Furinvalle d. Yes, date unknown
- 3 John 3rd Lord Marmion [1.1.1] d. Abt 1360
- 3 Avice Marmion [1.1.2] d. Yes, date unknown
- John (2nd Lord of Rotherfield) De Grey b. 9 Oct 1300 d. 1359
- 4 John Marmion [1.1.2.1] d. 1387
- 4 Sir Robert Grey, later Marmion [1.1.2.2] d. Yes, date unknown
[ =>]
- 4 Maud De Grey [1.1.2.3] d. Yes, date unknown
[ =>]
- 4 John Marmion [1.1.2.1]
- 3 Joan Marnion [1.1.3] d. Yes, date unknown
- John (of Tattershall) Bernake d. Yes, date unknown
- 4 Maude (of Tattershall) Bernake [1.1.3.1] d. 10 Apr 1419
[ =>]
- 4 Maude (of Tattershall) Bernake [1.1.3.1]
- 3 John 3rd Lord Marmion [1.1.1]
- 2 John (of Tanfield Etc) 2nd Baron Marnion [1.1]