Vastineinen
Vastineinen is a Finnish surname. The word "vastine" in Finnish can mean a response, a counterpart, or a counterweight. The suffix "-inen" is a common adjectival and possessive suffix in Finnish, often indicating something belonging to or characterized by the root word. Therefore, the surname Vastineinen likely originates from a descriptive term, possibly related to a person known for their responsiveness, being a counterpart to someone, or having some association with a counterweight.
As with many Finnish surnames, the exact historical origin of Vastineinen is difficult to pinpoint without