Where does “ingeminandus” come from?

ingeminandus (Latin) comes from Latin ingemino, from Latin gemino, from Latin Geminus, from Latin geminus, from Proto-Italic jemanos, from Proto-Indo-European yemH- — twin.

Definitions

Ancestry of “ingeminandus”, step by step

Step	Language	Word	Meaning
1	Latin	ingemino	I repeat, reiterate; I am redoubled, increase
2	Latin	gemino	dative masculine singular of geminus; dative...
3	Latin	Geminus	twinborn, twin
4	Latin	geminus	twin; double, paired; a twin
5	Proto-Italic	jemanos	—
6	Proto-Indo-European	yemH-	twin

Every word from Proto-Indo-European yemH- →Every word from Proto-Italic jemanos →Every word from Latin geminus →