Where does “Monseigneur” come from?

Monseigneur (French) comes from French Seigneur, from Middle French seigneur, from Old French seignor, from Latin senior, from Latin senex, from Proto-Indo-European sénos — old.

Monseigneur (French): Alternative letter-case form of monseigneur

Definitions

Alternative letter-case form of monseigneur

Ancestry of “Monseigneur”, step by step

Monseigneur traces back through two separate lines of ancestry.

via French Seigneur

Step	Language	Word	Meaning
1	French	Seigneur	Lord
2	Middle French	seigneur	lord; sire
3	Old French	seignor	lord; sire; master
4	Latin	senior	older, elder; rather old; a lord, sir; an abbot
5	Latin	senex	old, aged, elderly; old person, old man, old...
6	Proto-Indo-European	sénos	old

via Old French mon

Step	Language	Word	Meaning
1	Old French	mon	my
2	Vulgar Latin	mum	—
3	Latin	mēum	an umbelliferous plant, Meum athamanticum
4	Ancient Greek	μῆον	baldmoney, spignel
5	Ancient Greek	μεῖον	inflection of μείων : ## masculine accusative...

Words derived from “Monseigneur”

Every word from Proto-Indo-European sénos →Every word from Latin senex →Every word from Latin senior →