Eberhard (ā´bərhärt´), d. 939, duke of Franconia; brother of the German king, Conrad I, whom he succeeded as duke. The first to rebel against the centralizing policy of Holy Roman Emperor Otto I, he was an important member of the successive coalitions against Otto. After Eberhard's death at the battle of Andernach, Otto seized his duchy.
"Eberhard." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (April 22, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/eberhard
"Eberhard." The Columbia Encyclopedia, 6th ed.. . Retrieved April 22, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/eberhard