 
| Type | Valeur | 
|---|---|
| Titre | Legacy NFS Source: William FitzWilliam - | 
| Personnes | 
|---|
|  Sir WILLIAM FitzWilliam I Sprotborough | 
| The Genealogy of the Existing British Peerage and Baronetage, Edmund Lodge, Norroy King of Arms, F.S.A., Name: Hurst & Blackett; Location: London; Date: 1859;, Page number: p. 224 | 
| Edmund Lodge, Norroy King of Arms, F.S.A., The Genealogy of theExisting British Peerage and Baronetage (London, Hurst & Blackett,1859). |