jouhyinen
Jouhyinen is a Finnish surname. The word "jouhi" in Finnish translates to "horsehair". Historically, horsehair was used for various purposes, including making brushes, weaving textiles, and as components in musical instruments like bows. Therefore, the surname likely originated as an occupational name, referring to someone who worked with horsehair. It could have denoted a craftsman who made or used horsehair products, or perhaps someone involved in the horse trade where such materials were abundant. Like many surnames, its exact origin and evolution may have varied across different families and regions within Finland. The prevalence of the surname is relatively low, indicating it is not one of the most common Finnish family names. Further genealogical research would be needed to trace specific family lines and their historical occupations.