Blair Homestead. Erected 1785 by Thomas Blair. Residence of his son, John Blair, for whom Blair County was named in 1846. John Blair was a member of the General Assembly and until his death, 1832, a leading citizen of the region. 1210 Foot of Ten Rd. (old William Penn Hwy.), Duncansville, PA by Pennsylvania Historical and Museum Commission Colour: blue Wikimedia: Flickr: Google Streetview OpenStreetMap