- Hugh De Vernon
Birth - about 1254 - Shipbrook, Cheshire, Eng. - Thomas Orreby
- Geoffrey de Mortimer
Birth - about 1254 - Of, Wigmore, Herefordshire, England - Carlo Ii King Naples
Birth - 1254 - Of, Napoli, Napoli, Italy - Guillaume D' Avesnes
Birth - 1254 - Of, Valenciennes, Nord, France - Walter de Lindsay
Birth - about 1254 - Parva, Lamberton, Mordington, Berwickshire - Robert de Cherleton
- Rhy Goncalez De Zavallos
Birth - about 1254 - Of, New Castile, Spain - Robert de Valoines
- Walter Cornwall
Birth - about 1254 - Brannel, Cornwall, England - Gilbert de Segrave
Death - 1254 - , Pons, Poitou, France - Fernan Perez de Barroso
Birth - about 1254 - Of, Toledo, New Castile, Spain - William Ferrers
- William de Cantilupe
- Floris D' Avesnes
Birth - 1255 - Of, Valenciennes, Nord, France - Sancho IV Alfonsez De Castilla y León
Birth - about 1255 - , , CASTILE, Spain - Saxe Vendelbo
- Niels Christensen Lændi Kaas af Sparre
- Anders Tokensen Hvide
Death - about 1255 - Dod For - Niels Eriksen Gyldenstierne til Aagaard og Restrup
Birth - about 1255 - Kettrup, Jammerbugt Municipality, Nordjylland - Phillip Egerton
Birth - about 1255 - Of Egerton, Cheshire, Eng - Ralph Badlesmere
Birth - about 1255 - , Badlesmere, Kent, England - Ralph de Toeni
Birth - about 1255 - Of, , , England - William de Ros
Birth - 1255 - Of, Hamlake, Yorkshire, England - Robert Dutton
Birth - about 1255 - Of, Dutton, Cheshire, England - Jacob Pedersen Skram
Birth - about 1255 - Rundhof, Angeln, Flensburg
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