A charter of 879 mentions Udo and his brothers taking part in the foundation of the college of Gemünden.
Udo Kier | Neustria | Udo Lindenberg | Udo Jürgens | Udo Weilacher | Udo Schütz | Udo Recker | Udo Dirkschneider | Udo | Udo Walendy | Udo (Slavic prince) | Udo Beyer | ''Robin'' Alexander Wolfgang Udo Eugen Wilhelm Gottfried of Sayn-Wittgenstein-Berleburg | Duke ''Christian'' Nikolaus Udo Peter of Oldenburg | Carl Lebrecht Udo Dammer | Berengar II of Neustria |