| Verfasser | Häufigkeit |
| Coppens, Joseph 1896-1981 |
106 |
| Coppens, Marguerite |
29 |
| Coppens, Chris 1948- |
17 |
| Coppens, Yves 1934-2022 |
17 |
| Coppens, Martien 1908-1986 |
14 |
| Coppens, Thera 1947- |
14 |
| Coppens, Chris |
13 |
| Coppens, Filip 1971- |
12 |
| Coppens, Pierre |
11 |
| Coppens, Jan |
10 |
| Coppens, Bernard |
9 |
| Coppens, Walter |
8 |
| Coppens, Joseph A. |
6 |
| Coppens, Laura 1980- |
6 |
| Coppens, Laurent 1750-1834 |
6 |
| Coppens, Pierre-François |
6 |
| Coppens de Houthulst, Willy |
5 |
| Coppens, Charles 1835-1920 |
5 |
| Coppens, E. C. |
5 |
| Coppens, Marc R. |
5 |