Where does “ĝemelo” come from?

ĝemelo (Esperanto) comes from Latin Geminus, from Latin geminus, from Proto-Italic jemanos, from Proto-Indo-European yemH- — twin.

ĝemelo (Esperanto): twin

Definitions

Step	Language	Word	Meaning
1	Latin	Geminus	—
2	Latin	geminus	twin; double, paired; a twin
3	Proto-Italic	jemanos	—
4	Proto-Indo-European	yemH-	twin

ĝemelo — Etymology, Origin & Word History | Etymology Explorer