Achternamen
| Achternaam | Aantal |
|---|---|
| Clerck, de | 6 |
| Clerckx | 1 |
| Clercq, de | 33 |
| Clercx | 15 |
| Clerdent | 1 |
| Clerebout | 1 |
| Clerex | 1 |
| Clerick | 1 |
| Clerinx | 4 |
| Clerix | 1 |
| Clerks | 3 |
| Clerkx | 16 |
| Clermons | 9 |
| Clermont | 7 |
| Clermonts | 25 |
| Clerq, de | 4 |
| Clerx | 74 |
| Clessens | 2 |
| Cleuren | 14 |
| Cleuskens | 33 |
| Cleuters | 10 |
| Cleutjens | 15 |
| Cleve, van | 1 |
| Cleven | 58 |
| Clever | 1 |