- Robert Bacon
Birth - about 1203 - Of, Letheringsett, Norfolk, England - William Fleming
- Alan La Zouche
Birth - about 1203 - Of, Ashby-de-la-Zouch, Leicestershire, England - Hamon de Venables
Birth - about 1203 - Kynderton, Cheshire, England - Giles Badlesmere
Birth - about 1203 - Castle, Tong, Kent, England - John de Carrick
- David de Lindsay
Birth - about 1203 - Of Luffness, Aberlady, East Lothian, Scotland - Adam de Kellet
- Fernan Perez De Toledo
Birth - about 1203 - Of Toledo, New Castile, Spain - Guy Wake
- William Fleming
- Reginald Bacon
Birth - about 1203 - Of, Letheringsett, Norfolk, England - William de Braose
Birth - 1204 - Brecknock, Surrey, England - Esbern Snare Assersen Hvide
- Walter de Riddlesford
- Anselm Marshall
Birth - about 1204 - Of, Pembroke, Pembrokeshire, Wales - Hugh Ferrers
Birth - about 1204 - Of, Derby, Derbyshire, England - Eustace Devereux
- Stephen de Segrave
Birth - about 1204 - Of, Seagrave, Leicestershire, England - Gilbert de Venables
Birth - about 1204 - , Kinderton, Cheshire, Eng - Hugh Fitton
Birth - about 1204 - Bollin, Cheshire, England - Vivian de Davenport
Birth - about 1204 - Of, Chester, Cheshsire, England - Phillip Mallpas Egerton
Birth - about 1204 - Of Gogh, Chesh, Eng - Alan Fitzwalter
- Isaac Ii Emperor Byzantine Empire
Death - before 12 April 1204 - Constantinople, Constantinople, Turkey - Imre King Of Hungary
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