Where does “populosité” come from?

populosité (French) comes from Latin populositas, from Latin populosus, from Latin -ōsus, from Old Latin -ōssus.

Ancestry of “populosité”, step by step

Step	Language	Word	Meaning
1	Latin	populositas	—
2	Latin	populosus	full of people, populous; populous
3	Latin	-ōsus	—
4	Old Latin	-ōssus	—

populosité — Etymology, Origin & Word History | Etymology Explorer