Where does “quintillizo” come from?

quintillizo (Spanish) comes from Spanish mellizo, from Old Spanish emellizo, from Vulgar Latin gemellicius, from Latin gemellus, from Latin -lus, from Proto-Italic -elos, from Proto-Indo-European -e-lós, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

quintillizo (Spanish): quintuplet

Definitions

quintuplet

Ancestry of “quintillizo”, step by step

quintillizo traces back through two separate lines of ancestry.

via Spanish mellizo

Step	Language	Word	Meaning
1	Spanish	mellizo	twin fraternal, born to the same parents at the same time
2	Old Spanish	emellizo	twin
3	Vulgar Latin	gemellicius	—
4	Latin	gemellus	twin
5	Latin	-lus	Alternative form of -ulus; diminutive suffix
6	Proto-Italic	-elos	Forms desubstantival and deadjectival diminutive nouns
7	Proto-Indo-European	-e-lós	—
8	Proto-Indo-European	-lós	Forms agent nouns from verbal roots

via Spanish quinto

Step	Language	Word	Meaning
1	Spanish	quinto	fifth; A young boy of a various towns who turns...
2	Latin	Quīntus	—
3	Latin	plicō	to fold, bend or flex; to roll up
4	Proto-Indo-European	pleḱ-	to fold, plait, weave
5	Proto-Indo-European	pel-	to cover, to wrap; skin, hide, cloth; to fold

Every word from Proto-Indo-European -lós →Every word from Latin -lus →Every word from Latin gemellus →