| Name | Role | Place | Source | |
|---|---|---|---|---|
| Alexander Mat | Witness | 1899 | Elsene | Civil registration marriages |
| Alexander Pierre Frederik Otto de Mat(t)ha | Military | Studbooks | ||
| Ernst Emiel Alexander de Mat | Registered | 1914 | Amsterdam | Overgenomen delen |
| Louis Fredrik Alexander Le Mat | Registered | 1820 | Utrecht | Population register |
| Louis Fredrik Alexander Le Mat | Registered | 1803 | Utrecht | Population register |
| Willem Alexander de Mat | Registered | 1892 | Amsterdam | Overgenomen delen |
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