French word prochain comes from Latin pro, Latin -pe

Detailed word origin of prochain

Dictionary entry	Language	Definition
pro	Latin (lat)	About. According to. As befitting. As, like. Before. For. In front, instead of. On behalf of.
-pe	Latin (lat)
proximus	Latin (lat)	(substantive) the latest, most recent, last. (substantive) the next. Adjoining. Nearest, next Nearest person or thing. Neighbour.
propeānus	Vulgar Latin (la-vul)
prochain	French (fra)	(literary) fellow man, fellow human being, neighbour Nearby. Next. Upcoming.

Words with the same origin as prochain