She was the wife of Pepin the Short and the mother of Charlemagne, Carloman and Gisela. Nickname Bertrada's nickname "Bertha Broadfoot" dates back to the 13th century, when it was used in Adenes Le Roi's trouvère Li rouman de Berte aus grands piés.
The exact reason that Bertrada was given this nickname is unclear. It is possible that Bertrada was born with a clubfoot, although Adenes does not mention this in his poem. The nickname might have been a reference to an ancient legend about a Germanic goddess named Perchta, to real and mythological queens named Bertha, or to several similarly-named Christian queens.
Many myths and legends exist in Europe and Asia, in which clubfooted people are described as the link between the world of the living and the spirit world.
Bertrada married Pepin the Short, the son of Charles Martel, the Frankish "Mayor of the Palace", in 741. However, Pepin and Bertrada were too closely related for their marriage to be legal at that time; the union was not canonically sanctioned until 749, after the birth of Charlemagne. According to French historian Léon Levillain, Bertrada was Pepin's first and only wife.Other sources suggest that Pepin had previously married a "Leutberga" or "Leutbergie", with whom Pepin would have had five children. Bertrada and Pepin are known to have had seven children: three sons and four daughters. Of these, Charlemagne (c. 742 – 814), Carloman (751 – 771) and Gisela (757 – 811) survived to adulthood. Pepin, born in 756, died in his infancy in 762. Bertrada and Pepin also had Berthe, Adelaide, and Rothaide. Gisela became a nun at Chelles Abbey. Pepin tried to divorce Bertrada a few years after their marriage, but the Pope opposed the divorce.The reason is still unknown, but according to historian Christian Settipani, Pepin might have wanted to marry a woman named Angla, who was the daughter of Theodrade. Queen of the Franks A statue of Bertrada of Laon by Eugène Oudiné, one of the twenty Reines de France et Femmes illustres in the Jardin du Luxembourg, Paris. In 751, Pepin and Bertrada became King and Queen of the Franks, following Pepin's successful coup against the Frankish Merovingian monarchs.Pepin was crowned in June 754, and Bertrada, Charlemagne, and Carloman were blessed by Pope Stephen II. After Pepin's death in 768, Bertrada lost her title as Queen of the Franks. Charlemagne and Carloman inherited the two halves of Pepin's kingdom. Bertrada stayed at the court and often tried to stop arguments between the two brothers. Some historians credit Bertrada's support for her elder son Charlemagne over her younger son Carloman, and her diplomatic skills, for Charlemagne's early success. Although her influence over Charlemagne may have diminished in time, she lived at his court, and, according to Einhard, their relationship was excellent. Bertrada recommended that Charlemagne set aside his legal wife, Himiltrude, and marry Desiderata, a daughter of the Lombard king Desiderius, but Charlemagne soon divorced Desiderata. Einhard claims this was the only episode that ever strained relations between mother and son. Later life and death Bertrada retired from the court after Carloman's death in 771 to live in Choisy-au-Bac, where Charlemagne had set aside a royal house for her. Choisy-au-Bac was favorable because of its history of being the home and burial place of several Merovingian kings. Bertrada died on 12 July 783 in Choisy-au-Bac.Charlemagne buried her in the Basilica of St Denis near Pepin. In literature Bertrada inspired Adenes Le Roi to write the trouvère Li rouman de Berte aus grands piés in 1270. Adenes referred to her as "Bertha Broadfoot", the earliest known usage of that nickname Bertrada is also referred to as "Bertha Broadfoot" in François Villon's 15th-century poem Ballade des dames du temps jadis