In the 1630s, French missionaries wrote that the Wenro's territory was north and east of the
Erie, east of the
Neutral across the
Niagara River, and west of the
Genesee River valley and the Genesee Gorge across where the Seneca had their home. Through the first half of the 17th century, sources report the Wenrohronon inhabited lands along both ends of the Lakes Erie and Ontario and their connecting river, the
Niagara River. This range ran from the west side of the lower
Genesee River valley around
Rochester, New York (opposite to the territory of the
Seneca) and extended westerly along the right bank (eastern) shores of the
Niagara River (opposite lands occupied by the
Neutral Confederacy on the Canadian side of today's river) and from lands at its source (Lake Erie, in the vicinity of Buffalo) continued a comparatively shorter distance along the southern shores at the eastern end of Lake Erie. While the terminal southern and western end of this range is unknowable, the extent along the southern shore of
Lake Ontario from
Rochester to
Buffalo) is about . North to south, it is likely their lands extended up from Lake Ontario farther southerly more than the approximately shown on the map, possibly to the
drainage divide (and Genesee River gorge area) formed atop the terminal moraine left behind by the
Laurentide Ice Sheet, but in all likelihood, into a shared hunting ground shared with the
Erie near the headwaters of the
Allegheny River. The Wenro's history was primarily recorded in the
Jesuit Relations. Their villages were described by
Jesuit missionaries as having been reduced to relatively fewer permanent settlements than their neighbors by internecine warfare in the late 16th century before becoming known to the
few French who encountered them. Protected by the gorges of the Genesee River on the east, their small territory likely contained few valuable resources save for hunting lands, and their survival between the oft-warring
Wendat and
Haudenosaunee was because they managed to trade simultaneously with both and their presence was valuable as a
buffer state. ==History==