| Father | Walter Buchanan 14 Laird of Buchanan (1443 - 1526) |
| Mother | Isabella Graham (1444 - 1510) |
| Sibling | Lady Margaretha Buchanan (1460 - 1537) |
| Sibling | Mary Ann Buchanan (1460 - 1505) |
| Sibling | Patrick Buchanan Younger of Buchanan (1460 - 1513) |
| Sibling | Lady Margaretha Buchanan (1460 - 1537) |
| Sibling | Egidia Giles Buchanan (1464 - 1520) |
| Sibling | Janet Buchanan (1469 - 1518) |
| Sibling | Patrick The Younger 16th Laird of Buchanan Buchanan (1470 - 1513) |
| Sibling | Maurice Buchannan (1471 - ) |
| Sibling | Elizabeth Buchanan (1472 - 1540) |
| Sibling | John Buchanan of Aughmar, Arnpryor and Gartartan (1495 - 1547) |
| Sibling | Buchanan ( - ) |