| Name | Marcus Antoon GRUL |
| Birth | 3 Nov 1961, Heemstede, Noord-Holland, Nederland |
| Occupation | Office-manager |
| Father | Dirk Johannes GRUL (1930-) |
| Mother | Erica Jacoba van DIJK (1938-) |
| 1 | Maria Elina Maaike STERRENBURG |
| Birth | 30 May 1968, Gorinchem, Zuid-Holland, Nederland |
| Occupation | Therapeute |
| Father | Pieter STERRENBURG (1925-2009) |
| Mother | Cornelia ROEST (1934-) |
| Marriage | 4 Jun 1993, Gorinchem, Zuid-Holland, Nederland |
| Divorce | Nov 2012, Dordrecht, Zuid-Holland, Nederland |
| Children | Margareta Louise Maaike (1996-) |
| Dirk Robert (1998-) | |
| Laurens Benjamin (2001-) | |
| Thom Marcus (2008-) |
| 2 | Suzyne Muthoni MUCEE |
| Birth | 1 Jan 1984, Kenya |
| Father | Francis MUCEE |
| Mother | Jane NJERU |
| Marriage | 7 Mar 2015, Kithino Village, Kenya |
| Children | James Fadhili (2017-) |