- Johann d.Ä. Lüneborg
- Robert de Vere
Birth - about 1230 - , Hedinham, Essex, England - Ingelram de Percy
Birth - about 1230 - , Petworth, NORTHUMBERLAND, England - Edmund de Lacy
Birth - 1230 - Of, , Lincolnshire, England - Hugh Venables
- Richard de Davenport
Birth - about 1230 - Of, Chester, Cheshire, England - Peder Skram
- Gunde Aghissen Wind
- Nicolaus Elersen Krummedige
Birth - about 1230 - Ottenbüttel, Schleswig - Moshe Treves
- Rabbi Benveniste ben Josef HaLevi
Death - about 1230 - Girona, Spanien - Stig Andersen Hvide
Birth - 1230 - Kongsdal, Undløse sogn, Holbæk amt - Niels Juul
- Edmund de Standish
Birth - about 1230 - , Standish, Lancashire, England - Enrqiue Fernandez Prince Castile & Leon
Birth - after 1230 - Of, Toledo, Toledo, Spain - William Patrick
- Robert Corbet
Birth - 1230 - Of, Moreton Corbet, Shropshire, England - Reynold Fitz Piers
Birth - about 1230 - , , England - Reynold Burghersh
Birth - about 1230 - Of Burghersh, Sussex, Of Chiddingstone, Kent - Garci Melendez de Soto-Mayor
Birth - about 1230 - Of, New Castile, Spain - Walter Burgh
Birth - about 1230 - Of, Connaught, , Ireland - Egino Iv "der Bartige", Count Of Urach
- Rugh De Standish
- Simon de Montacute
Birth - about 1230 - Of, , Somersetshire, England - Lope Garciez de Padilla
Birth - 1230 - , , , Spain - Walter de Lindsay
Birth - about 1231 - Of Lamberton, Mordington, Berwickshire, Scotland - Ekkehard von Schack
- Felipe Fernandez Prince Castile & Leon
Birth - after 1231 - Of, Toledo, Toledo, Spain - Gutierre Fernandez De Toledo
Birth - about 1231 - Of Toledo, New Castile, Spain - Ralph de Somery
Birth - about 1231 - Of, Dudley, Staffordshire, England - Michael Manvers
- Bartholomew Badlesmere
Birth - about 1231 - , Badlesmere, Kent, England - William de Percy
Birth - about 1231 - , Petworth, NORTHUMBERLAND, England - Gutierre Armildez
Birth - about 1231 - Of Toledo, New Castile, Spain - John Segrave
- John de Warenne
- Luke de Poynings
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