Comte (Count) de Montaigu, French ambassador to Venice (1743-1777), Jean-Jacques Rousseau's boss.

Who was Rousseau? The historian Paul Johnson in Intellectuals:

`The inquiry begins with Jean-Jacques Rousseau (1712-78), who was the first of the modern intellectuals, their archetype and in many ways the most influential of them all. Older men like Voltaire had started the work of demolishing the altars and enthroning reason. But Rousseau was the first to combine all the salient characteristics of the modern... assertion of his right to reject the exiting order... confidence in his capacity to refashion it... belief that this could be achieved by the political process... He believed that he had a unique love for humanity...

... many contemporaries held him responsible ... for the demolition of the ancien regime in Europe. This view was shared by both Louis XVI and Napoleon.'

Despite his intellectual repute, Johnson is scathing in his critique of Rousseau's character, vanity, and `cult'. The Count enters the pictures thus:

`Until he was well into his thirties, Rousseau led a life of failure and dependence, especially on women. He tried at least thirteen jobs, as an engraver, lackey, ..., and private secretary. In 1743 he was given what seemed the plum post of secretary to the French Ambassador in Venice, the Comte de Montaigu. This lasted eleven months and ended in his dismissal and flight to avoid arrest in the Venetian Senate. Montaigu stated (and his version is to be preferred to Rousseau's own) that his secretary was doomed to poverty on account of his `vile disposition' and `unspeakable insolence', the product of his `insanity' and `high opinion of himself.

... One of the reasons Montaigu, a military man, came to dislike him so much was Rousseu's habit, when taking dictation, of yawning ostentatiously or even strolling to the window, while the Ambassador struggled for a word.'

Sources:
Intellectuals, Johnson.

http://www.montaguemillennium.com/familyresearch/h_1777_pierre.htm