Early seal of William I de Cantilupe (d.1239), 1st feudal baron of Eaton Bray in Bedfordshire, as published in Planche, J.R. The Pursuivant of Arms; or Heraldry Founded Upon Facts, London, 1873, p.134. Blazon: <i>Gules, three fleurs-de-lys or</i>. His arms in later generations changed to <i>Gules, three leopard's faces jessant-de-lys or</i>. Original full legend probably: SIG(ILLUM WILLELMI DE CANTIL)UPO ("Seal of William de Cantilupe"). See traced/standardised image of this shield<a href="//commons.wikimedia.org/wiki/File:Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg" class="image"><img alt="Arms William I DeCantilupe Died1239 TracedFromHisSeal.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg/100px-Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg.png" decoding="async" width="100" height="112" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg/150px-Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg/200px-Arms_William_I_DeCantilupe_Died1239_TracedFromHisSeal.svg.png 2x" data-file-width="578" data-file-height="648"></a>
Planche, J.R
1873
Planche, J.R. The Pursuivant of Arms; or Heraldry Founded Upon Facts, London, 1873, p.134