- Mrs. Ziemowit, Prince Poland
Birth - about 840 - Of Poznan, Poznan, Poland - Hathumod von Sachsen
- Graf Hermann II von Osnabrück
- Ezzo I. im Bleisgau
- Graf Udo II. von Lahngau
- Judith vom Auxerre
- Christopheros (unknown)
- Nikephoros Skleros
- Waltfred von Verona
- Unruoch III von Friaul
- Ava von Tours
- Adalhard II. von Metz
- Arpad, Prince Of Hungary
Birth - about 840 - Of, , Pannonia - Mrs-Hakon Grjotgardsson
Birth - about 840 - Hlade, Trondheim, Sor-Trondelag, Norway - Wilfred I "el Urgel & Barcelon
Birth - 840 - Of Urgel, Lerida, Spain - Ethelbald King Of Wessex
Birth - about 840 - Of, Wantage, Berkshire, England - Olaf Gudrodsson King
- Hrolf Ingjaldsson
Birth - about 840 - Of, Dyflinni, , Ireland - Mrs-Constantine I, Queen Scotland
Birth - about 840 - Of, , , Scotland - Olof "The White" Ingjaldsson King
Birth - about 840 - Of, Dyflinni, , Ireland - Benjamin ben Eliezer Maniumi
- Louis I "The Pious" Emperor Of The HOLY ROMAN EMPIRE Holy Roman Empire
Death - 20 June 840 - near, Ingelheim, Rhinehessen, Hesse - Eberhard von Friaul
- Kaiser Ludwig I (Chlodwig) "der Fromme"
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