Margaret De Quincy
- Bef 1266(
= Descendancy chart to this point, 
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- 1 Margaret De Quincy [1] d. Bef 30 Mar 1266
- John (1st Earl of Lincoln) De Lacy b. Abt 1192 d. 22 Jul 1240
- 2 Maude De Lacy [1.1] d. 1289
- Richard (2nd Earl of Gloucester) De Clare b. 4 Aug 1222 d. 15 Jul 1262
- 3 Gilbert The Red (3rd Earl Ofgloucester) De Clare [1.1.1] b. 2 Sep 1243 d. 7 Dec 1295
- Alice De Lusignan d. Yes, date unknown
- 4 Isabella (of Gloucester) De Clare [1.1.1.1] d. Yes, date unknown
- 4 Joan\Johanna (of Gloucester) De Clare [1.1.1.2] b. Abt 1268 d. Aft 1322
[ =>]
- 4 Isabella (of Gloucester) De Clare [1.1.1.1]
- Joan Princess of Acre b. 1272 d. 23 Apr 1307
- 4 Elizabeth De Clare [1.1.1.3] b. 16 Sep 1295 d. 4 Nov 1360
[ =>]
- 4 Margaret (of Gloucester) De Clare [1.1.1.4] b. Oct 1292 d. 9 Apr 1342
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- 4 Gilbert (Earl of Gloucester) De Clare [1.1.1.5] b. 10 May 1291 d. Yes, date unknown
- 4 Alianore De Clare [1.1.1.6] b. 1292 d. 30 Jun 1337
[ =>]
- 4 Johanna De Clare [1.1.1.7] d. Yes, date unknown
- 4 Elizabeth De Clare [1.1.1.3]
- 3 Rohese De Clare [1.1.2] b. 17 Oct 1252 d. Aft 1299
- Roger (1st Lord Mowbray) De Mowbray d. 1297
- 4 John (2nd Lord Mowbray) De Mowbray [1.1.2.1] d. 1322
[ =>]
- 4 John (2nd Lord Mowbray) De Mowbray [1.1.2.1]
- 3 Thomas (Lord of Thormond) De Clare [1.1.3] b. Abt 1245 d. 1287
- Julian Fitzmaurice d. 1300
- 4 Gilbert (Lord Thomond) De Clare [1.1.3.1] b. 1281 d. Yes, date unknown
- 4 Richard (Lord Thomond) De Clare [1.1.3.2] b. Aft 1281 d. Yes, date unknown
- 4 Richard (Master) De Clare [1.1.3.3] b. Abt 1286 d. Yes, date unknown
- 4 Maud De Clare [1.1.3.4] d. Yes, date unknown
[ =>]
- 4 Margaret De Clare [1.1.3.5] d. 1333
[ =>]
- 4 Gilbert (Lord Thomond) De Clare [1.1.3.1]
- 3 Isabel De Clare [1.1.4] b. May 1240 d. Yes, date unknown
- + William Marquis De Montferrat d. Yes, date unknown
- + William Marquis De Montferrat d. Yes, date unknown
- 3 Bogo De Clare [1.1.5] b. 21 Jul 1248 d. Yes, date unknown
- 3 Margaret De Clare [1.1.6] b. 1245 d. Yes, date unknown
- 3 Eglentina De Clare [1.1.7] b. 1257 d. Yes, date unknown
- 3 Robert De Clare [1.1.8] d. Yes, date unknown
- 3 Gilbert The Red (3rd Earl Ofgloucester) De Clare [1.1.1]
- 2 Edmund (2nd Earl of Lincoln) De Lacy [1.2] d. 1257
- Alice d. Yes, date unknown
- 3 Henry (3rd Earl of Lincoln) De Lacy [1.2.1] d. Yes, date unknown
- Margaret De Longespee d. Yes, date unknown
- 4 Alice (Countess of Lincoln) Lacy [1.2.1.1] b. 25 Dec 1281 d. 2 Oct 1348
- 4 Alice (Countess of Lincoln) Lacy [1.2.1.1]
- 3 Henry (3rd Earl of Lincoln) De Lacy [1.2.1]
- 2 Maude De Lacy [1.1]
- + Walter (8th Earl of Pembroke) Marshal b. Aft 1198 d. Nov 1245