Bertha
the name of several famous women of the Middle Ages, half historical, half fabulous. ST. BERTHA, whose day is kept on July 4, was the beautiful and pious daughter of Charibert, King of the Franks, who, having married (560 A. D.) Æthelbert, King of Kent, became the means of his conversion, and of the spread of Christianity among the Anglo-Saxons. In the romances of the Charlemagne cycle, there figures a BERTHA, called also Berthrada with the Big Foot, as the daughter of Count Charibert of Laon, wife of Pepin the Little and mother of Charlemagne.
In the romances of the "Round Table," again, BERTHA is the name of a sister of Charlemagne, who makes Milo d'Anglesis the father of Roland. Better known is BERTHA, daughter of Burkhard, Duke of the Allemanni, and wife of Rudolf II., King of Burgundy beyond Jura, who, after Rudolf's death (937), acted as regent for her infant son, Konrad; she afterward married Hugo, King of Italy; and died toward the close of the 10th century.