Ain't no secret folks, even Wikipedia admits this.

"Patriarchy literally means "the rule of the father"\10])\5]) and comes from the Greek πατριάρχης (patriarkhēs),\11])\12]) "father or chief of a race",\13]) which is a compound) of πατριά (patria), "lineage, descent, family, fatherland"\14]) (from πατήρ patēr, "father")\15]) and ἀρχή (arkhē), "domination, authority, sovereignty".\16])

Historically, the term patriarchy has been used to refer to autocratic rule by the male head of a family; however, since the late 20th century it has also been used to refer to social systems in which power is primarily held by adult men.\17])\18])\19]) The term was particularly used by writers associated with second-wave feminism such as Kate Millett; these writers sought to use an understanding of patriarchal social relations to liberate women from male domination.\20])\21]) This concept of patriarchy was developed to explain male dominance as a social, rather than biological, phenomenon."

https://en.wikipedia.org/wiki/Patriarchy