It is possibly an abbreviation for "Monsieur" (Sir), although the standard one is "M.", not "Mr." or "Mons."
"Mon" means "My" (sing.), but the plural form is "Mes", so it does not seem to fit.
Mons, in the Latin, means Mount, as in Mons Olympus (Mount Olympus), and in Anatomy it means 'mound' referencing a localized mound of tissue such as the Mons Pubis
Do not know of Mount Mons. Perhaps you mean Olympus Mons- the giant mountain on mars?
Yes. Actually, a lot. The biggest one is Olympus Mons. Some other ones are Askraes Mons, Pavonis Mons, and Arsia Mons.
Olympus Mons is a gigantic volcano on Mars.
University of Mons was created in 2009.
R.A.E.C. Mons was created in 1909.
Willem Mons died in 1724.
Gislebert of Mons died in 1225.
Athis-Mons's population is 30,858.
Mons A. Kårbø died in 1964.
Mons A. Kårbø was born in 1881.
Mons Lid was born in 1896.
Mons Lid died in 1967.