Where does “sinjorino” come from?

sinjorino (Esperanto) comes from Esperanto sinjoro, from Italian signore, from Latin seniōrem, from Latin senex, from Proto-Indo-European sénos — old.

sinjorino (Esperanto): madam, miss

Definitions

madam, miss

Ancestry of “sinjorino”, step by step

Step	Language	Word	Meaning
1	Esperanto	sinjoro	sir, mister
2	Italian	signore	lord, gentleman; sir; Lord, God
3	Latin	seniōrem	—
4	Latin	senex	old, aged, elderly; old person, old man, old...
5	Proto-Indo-European	sénos	old

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