Méen was the son of Guillaume II de Derval and Anne de Rostrenen. The date and place of his birth have not been found.
+ | ||||||||
| | |||||||
| ||||||||
Anne de Rostrenen |
Riwallon II de Rostrenen |
Pierre I de Rostrenen |
||||||
| ||||||||
Theophanie de Lanvaux |
||||||||
|