French sieur

← Spanish señor (cognate)

← French sire (mention)

← French seigneur (mention)

← Old French sire (inherited)

← Italian signore (cognate)

← Latin senior (inherited)

← Latin senex (mention)

→ French monsieur (mention)

→ Friulian siôr (cognate)

→ Haitian Creole mesye (mention)

→ Haitian Creole msye (mention)

→ Ido sioro (borrowed)

→ Italian monsù (compound)

→ Piedmontese monsù (compound)