Where does “popul” come from?

popul (Middle English) comes from Old English popul, from Latin pōpulus, from Proto-Italic poplos — army.

Ancestry of “popul”, step by step

Step	Language	Word	Meaning
1	Old English	popul	—
2	Latin	pōpulus	—
3	Proto-Italic	poplos	army

popul — Etymology, Origin & Word History | Etymology Explorer