Marshall County was formed in 1835 from Ohio County and named for Chief Justice John Marshall. In Marshall County is Grave Creek Mound, first among the remains left by the unknown race that lived in the Ohio Valley centuries before white settlement. Wetzel County was formed in 1846 from Tyler County and was named for Lewis Wetzel, the frontiersman who, with his brothers during Indian days, ranged the settlements from their home in Marshall County throughout northern West Virginia.