| Albert d'Udekem d'Acoz (05/04/1828-17/06/1900) | |
| Maximilien d'Udekem d'Acoz (14/09/1861-21/01/1921) | |
| Marguerite d'Udekem d'Acoz (16/11/1862-24/11/1864) | |
| Louise d'Udekem d'Acoz (18/08/1864-) | |
| Paul d'Udekem d'Acoz (03/12/1865-28/12/1952) | |
| Eugénie d'Udekem d'Acoz (12/05/1867-16/05/1867) | |
| Auguste d'Udekem d'Acoz (27/08/1868-31/08/1868) | |
| Henri d'Udekem d'Acoz (02/10/1870-~1915) | |
| Madeleine d'Udekem d'Acoz (11/04/1872-05/05/1872) | |
| Xavier d'Udekem d'Acoz (04/03/1873-) | |
| Jacques d'Udekem d'Acoz (21/01/1876-) | |
| ? d'Udekem d'Acoz (02/11/1877-02/11/1877) | |
| Charles d'Udekem d'Acoz (08/03/1885-) | |
| Marguerite d'Udekem d'Acoz (16/06/1888-28/09/1916) | |
| Elisabeth d'Udekem d'Acoz (13/03/1890-) | |
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| Restricted to members |