St. Mainboeuf (or Mainbeuf, or Maimbod) is better known in non-French sources as St. Magnobodus, bishop of Angers, France from 610-660. He was chosen bishop by acclaim (ie, by voice vote of the people of the city).
He built a church of St. Saturninus, and established houses for the care of foundlings. He wrote the Vita S. Licinii (Life of St. Licinius/Lezin) in honor of the bishop who was his predecessor, and the Vita S. Maurilii (Life of St. Maurilius), a fifth century bishop of Angers who was a disciple of St. Martin of Tours.
His feast is October 16.