I can find no source evidence for Gozlin III, comte du Maine let alone a marriage to Godelhide of the Holy Roman Empire that produced Aubert du Maine Godefroi du Maine de Jarzé, IV or Godehilde du Maine !
Please help
This places into question the descent lines of:
Aubert to Geoffroy I de Mayenne and on
Godfrey through Thibault du Maine and Agnès du Maine and on
Godehilde and Gerberge d'Anjou
No decent sources anywhere on these