Choreography and overall direction were provided by the Italian dancing master Baltazarini, known as Balthasar de Beaujoyeulx.
Beaulieu's wife was the Genoese soprano and lutenist Violante Doria.
[3] They had a daughter Claude de Beaulieu who later was paid as a lutenist at the court.
The error concerning his name, and consequent separation of the bass singer and composer into two biographies, is due to an erroneous "Lambert de Beaulieu" in a letter by Rudolf II, Holy Roman Emperor to the French king attempting to employ the composer Beaulieu for his own court.
The error in Rudolf's letter was reproduced by François-Joseph Fétis in his influential Biographie universelle des musiciens.