Mary of Burgundy was born in Brussels at the ducal castle of Coudenberg, to Charles the Bold, then known as the Count of Charolais, and his wife Isabella of Bourbon. Her birth, according to the court chronicler Georges Chastellain, was attended by a clap of thunder ringing from the otherwise clear twilight sky. Her godfather was Louis, Dauphin of France, in exile in Burgundy at that time; he named her for his mother Marie of Anjou. Reactions to the child were mixed: the baby's grandfather, Duke Philip the Good, was unimpressed, and "chose not to attend the [baptism] as it was only for a girl", whereas her grandmother Isabella of Portugal was delighted at the birth of a granddaughter. Her illegitimate aunt Anne was assigned as her governess.