 Initial hunters and settlers in the territory that includes present-day Jenner Township were Mingo, also known as the Seneca, one of the Six Nations of the Iroquois.The land was ceded by the Iroquois Six Nations officially by the Treaty of Fort Stanwix of 1768 to Penn family as proprietors of Pennsylvania province.Early European traders crossed Jenner Township as early as 1750, when Christopher Gist documented his brief time there in his travel diary.