+———Nicholas Kirby (1500 England – 1555)          |      +———Thomas Kirby (1520 England – 1573 England)      |   |          |   +———Joan Unknown      |  +———John Kirby (1550 England – 1621 CT)  |   |      |   +———Joan Smythe (1525 England – 1573)  |      Joan Kirby (1580 England – 29 Oct 1640)  |          |   +———William Cranfield (1530 England – 1614 England)  |   |  +———Joan Cranfield (1555 England – Oct 1640 CT)