Nielsen Hayden genealogy
Descendants of (One of the several mistresses of Llywelyn ap Iorwerth)
(One of the several mistresses of Llywelyn ap Iorwerth)
Llywelyn Fawr ap Iorwerth (Abt 1173 - 11 Apr 1240 Aberconwy Abbey, Conwy, Wales)
   ├─ Margaret ferch Llywelyn ( - 1265)
   │ John de Brewes (Abt 1197 of Gower, Swansea, Wales - Between 1231 and 1232)(m. 1219)
   │ :   ├─ William de Brewes (Abt 1224 of Bramber, Sussex, England - 6 Jan 1291 Findon, Sussex, England)
   │ :   │ Agnes de Moels ( - Bef 1271)
   │ :   │ :   └─ Giles de Brewes ( - Bef 7 Jan 1305 of Buckingham, Buckinghamshire, England) =>
   │ :   │ :    + Beatrice de Saint Helen
   │ :   │ :    + Maud de Whitney
   │ :   │ Aline de Multon ( - Bef 1268)(m. Bef 1253)
   │ :   │ :   └─ William de Brewes (of Bramber, Sussex, England - Bef 1 May 1326) =>
   │ :   │ :    + Agnes ( - Bef 1317)
   │ :   │ Mary de Ros ( - Bef 23 May 1326)(m. Bef 1272)
   │ :   │    └─ Peter de Brewes (Abt 1273 of Tetbury, Gloucestershire, England - Bef 7 Feb 1312) =>
   │ :   │     + Agnes ( - Bef 1332)(m. Aft 6 Jun 1300)
   │ :   └─ Richard de Brewes (Bef 1232 of Stinton in Salle and Heydon, Norfolk, England -
   │ :    Bef 18 Jun 1292 bur.Woodbridge Priory, Suffolk, England)
   │ :    Bef 18 Jun 1292 bur.Woodbridge Priory, Suffolk, England)
   │ :    Alice le Rus (Abt 1247 - Bef 28 Jan 1301 bur.Woodbridge Priory, Suffolk, England)(m. Bef 9 Sep 1265)
   │ :       │ + Roger de Coleville (Abt 1251 of Bytham, Lincolnshire, England - Bef 6 Mar 1288)
   │ :       ├─ Giles de Brewes (Abt 1273 of Stinton in Salle and Heydon, Norfolk, England - Bef 6 Feb 1311) =>
   │ :       │ + Joan de Beaumont ( - Aft 1315)(m. Bef 1304)
   │ :       └─ Richard de Brewes (Abt 1274 of Stradbroke, Suffolk, England - Abt 1324) =>
   │ :        + Eleanor Furnival (Abt 1260 - Aft 1302)(m. Aft 17 Mar 1296)
   │ Walter IV de Clifford (of Clifford, Herefordshire, England - Bef 23 Dec 1263)(m. Bef 2 Nov 1234)
   │    └─ Maud de Clifford (of Clifford, Herefordshire, England - Between 1282 and 1285)
   │     William LongespĂ©e (of Amesbury, Wiltshire, England - Between 23 Dec 1256 and 3 Jan 1257)
   │     :    + Henry Lacy (Abt 1250 - 5 Feb 1310 London, England)(m. Abt 25 Dec 1256)
   │     John Giffard (Abt 1232 of Brimpsfield, Cirencester, Gloucestershire, England -
   │     28 May 1299 bur.Malmesbury Abbey, Wiltshire, England)(m. Bef 10 Mar 1271)
   │     28 May 1299 bur.Malmesbury Abbey, Wiltshire, England)(m. Bef 10 Mar 1271)
   │        │ + Nicholas de Audley (Bef 1258 of Heleigh in Audley, Staffordshire, England - Bef 28 Aug 1299)
   │        └─ Eleanor Giffard (1275 of Brimpsfield, Cirencester, Gloucestershire, England - Bef 23 Jan 1324) =>
   │         + Fulke le Strange (Abt 1267 of Blackmere, Whitchurch, Shropshire, England - Bef 23 Jan 1324)
   │         (m. Bef 1301)
   │         (m. Bef 1301)
   ├─ Ellen ( - Aft Feb 1294)
   │ Donald of Mar ( - Aft 25 Jul 1297)
   │    ├─ Isabel of Mar ( - Bef 1302)
   │    │ Robert de Brus, King of Scotland (11 Jul 1274 Scotland - 7 Jun 1329 Cardross, Dumbartonshire, Scotland)
   │    │ (m. Abt 1295)
   │    │ (m. Abt 1295)
   │    │    └─ Marjory Bruce ( - Oct 1317 bur.Paisley, Renfrewshire, Scotland) =>
   │    │     + Walter Stewart (Abt 1297 - 9 Apr 1327 Bathgate, West Lothian, Scotland)(m. Aft 25 Apr 1315)
   │    └─ Gratney of Mar (Abt 1270 - Bef Sep 1305)
   │    
   │        │ + John Menteith (of Arran, Ayrshire, Scotland - Abt 1344)
   │        └─ Donald, Regent of Scotland (Abt 1293 - 12 Aug 1332 Dupplin, Perth, Scotland) =>
   │         + Isabel Stewart ( - Between 15 Jun 1347 and 15 Jan 1348)
   └─ Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd (Abt 1200 - ??)
    Gwenllian ferch Ednyfed Fychan
       └─ Angharad ferch Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd
        Gruffudd ap Hywel ap Maredudd ab Einion (Abt 1270 - ??)
           └─ Ieuan ap Gruffudd ap Hywel (Abt 1300 of Eifionydd, Caernarvonshire, Wales - ??) =>
            + Efa ferch Gruffudd ap Dafydd Goch ap Dafydd ( - Aft 1351)