French Creek is a tributary of the Allegheny River in northwestern Pennsylvania and western New York in the United States. The stream has been sometimes called a river and sometimes a creek. It is thought that the stream's Seneca name, in nungash, was modified over time to Venango. The phrase in nungash may have derived from Onenga, th…French Creek is a tributary of the Allegheny River in northwestern Pennsylvania and western New York in the United States. The stream has been sometimes called a river and sometimes a creek. It is thought that the stream's Seneca name, in nungash, was modified over time to Venango. The phrase in nungash may have derived from Onenga, the Seneca word for mink, or it may have stemmed from Winingus, the Delaware word for the same animal. Interpretations of Venango have included "crooked", and the Seneca chief Cornplanter suggested that in nungash referred to a particular carving on a tree along the stream. Venango was likewise the name of a native settlement at the creek's mouth, later the site of Franklin, Pennsylvania.