Nielsen Hayden genealogy
Descendants of Garsie
Garsie
   └─ Arnaud de Gaveston (of Gabaston, Bearn, Gascony, France - ??)
    Claramonde de Marsan ( - 1287)
       └─ Piers de Gaveston (Bef Sep 1283 Gabaston, Bearn, Gascony, France -
        19 Jun 1312 Blacklow Hill near Warwick, Warwickshire, England)
        19 Jun 1312 Blacklow Hill near Warwick, Warwickshire, England)
        (Unknown mistress of Piers de Gaveston)
        :    + John Driby
        + Margaret de Clare (Abt 1292 Caerphilly, Glamorgan, Wales - 9 Apr 1342 bur.Queenhithe, London, England)
        (m. 1 Nov 1307 Berkhamsted, Hertfordshire, England)
        (m. 1 Nov 1307 Berkhamsted, Hertfordshire, England)