__ | _James BUCHANAN _____| | (1702 - 1765) | | |__ | _John BUCHANAN ______| | (1732 - 1780) | | | __ | | | | |_Martha ALLISON _____| | (1705 - 1743) | | |__ | | |--John BUCHANAN | (1761 - 1831) | __ | | | _____________________| | | | | | |__ | | |_Martha BUCHANAN ____| (1730 - 1780) | | __ | | |_____________________| | |__