It is a combination of French and Spanish, and means "my" (mon=French) and "saint" (santo=Spanish)
Mon petit tresor
Mon chez means my home (it should be - mon chez moi)
It means "Holy world to bring" Santo = holy mondo = world portare = to bring
mon amour, mon chéri means my love, my darling boy
Mon patron is "my boss" in French. In French, the word is never used to mean 'customer'.
mon
What does mon mean
If you mean "mon dessin", it means "my drawing"
Mon petit tresor
mon amour = my love
Mon is typically the pronoun for my or mine.
mon père - my father
To my knowledge, mon is my. Example: Comment allez-vous, mon ami?
Mon chez means my home (it should be - mon chez moi)
"mon ami" means "my friend", "mon amour" means "my love", "darling".
perhaps you mean - mon avis? - my opinion
Mon anniversaire means "my birthday".