Nielsen Hayden genealogy
Descendants of Pedro I, King of Castile
1334 - 1369 (34 years)Father: Alfonso XI, King of Castile and Leon (13 Aug 1311 Salamanca, Salamanca, Spain - 26 Mar 1350 Gibraltar, Spain)
Mother: Maria of Portugal (Abt 1313 - 13 Jan 1357 Évora, Alentejo, Portugal)
Pedro I, King of Castile (30 Aug 1334 Burgos, Castile, Spain - 23 Mar 1369 Montiel, Ciudad Real, Castile-la-Mancha, Spain)
Maria García de Padilla (Abt 1335 - Jul 1361 Seville, Andalusia, Spain)(m. 1353)
   ├─ Constance of Castile (1354 - 24 Mar 1394)
   │ + John of Gaunt (Mar 1340 Abbey of St. Bavo, Ghent, Flanders - 3 Feb 1399 Leicester Castle, Leicester,
   │ Leicestershire, England)(m. 21 Sep 1371 Roquefort, near Bordeaux, Guienne, France)
   │ Leicestershire, England)(m. 21 Sep 1371 Roquefort, near Bordeaux, Guienne, France)
   └─ Isabella of Castile (1355 - 23 Dec 1392 bur.Church of the Dominicans, Langley, Hertfordshire, England)
    Edmund of Langley (Kings Langley, Hertfordshire, England;5 Jun 1341 - 1 Aug 1402)
    (m. Between 1 Jan 1372 and 30 Apr 1372 Hertford, Hertfordshire, England)
    (m. Between 1 Jan 1372 and 30 Apr 1372 Hertford, Hertfordshire, England)
       ├─ Constance of York (Abt 1374 - 28 Nov 1416)
       │ Thomas le Despenser (22 Sep 1373 - 16 Jan 1400)(m. Abt 7 Nov 1379)
       │     + Richard de Beauchamp (Abt 1397 - 18 Mar 1422 Meaux, Seine-et-Marne, Île-de-France, France)
       │     : (m. 27 Jul 1411 Tewkesbury, Gloucestershire, England)
       │     : (m. 27 Jul 1411 Tewkesbury, Gloucestershire, England)
       │     + Richard de Beauchamp ( - 30 Apr 1439 Rouen, Seine-Maritime, Normandy, France)
       │     (m. 26 Nov 1423 Hanley Castle, Worcestershire, England)
       │     (m. 26 Nov 1423 Hanley Castle, Worcestershire, England)
       └─ Richard of Conisburgh (Abt 1375 Conisburgh Castle, Yorkshire, England -
        5 Aug 1415 Southampton, Hampshire, England)
        5 Aug 1415 Southampton, Hampshire, England)
        Anne de Mortimer (27 Dec 1390 - Sep 1411 bur.Kings Langley, Hertfordshire, England)(m. Bef 23 May 1408)
           │ + Henry Bourchier ( - 1483)
           └─ Richard of York (22 Sep 1411 - 30 Dec 1460 Wakefield, Yorkshire, England) =>
            + Cecily Neville (3 May 1415 - 31 May 1495 Berkhamsted Castle, Hertfordshire, England)
            (m. Bef 18 Oct 1424)
            (m. Bef 18 Oct 1424)