| Name | Derek John GRUL |
| Birth | 29 Jul 1961, Hamilton, New Zealand |
| Occupation | Maintenance Engineer |
| Father | Theodorus Cornelis GRUL (1935-) |
| Mother | Ellen OTTINK (1935-) |
| 1 | Janine Faye JACKSON |
| Birth | 14 Mar 1962, Auckland, New Zealand |
| Occupation | Cartgrapher |
| Father | Eric Forsyth JACKSON (1934-) |
| Mother | Joan Isabel CREMER (1930-) |
| Marriage | 25 Apr 1984, Auckland, New Zealand |
| Children | Alanna Jayne (1987-) |
| Caleb Theodore (1989-) | |
| Olivia Joanne (1991-) |