Where does “populositas” come from?

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

Ancestry of “populositas”, step by step

Step	Language	Word	Meaning
1	Latin	populosus	full of people, populous; populous
2	Latin	-ōsus	ose, -ous, -ful (full of or overly prone to)
3	Old Latin	-ōssus	—