There is the Spanish/Portuguese/Catalan/Occitan name
Amador. The Occitan form is pronounced [ama'du] and sometimes it is misspelled
*Amadour or
*Amadou, because of the French influence.
So in old French archives is possible to find the form Amadou in relation with Occitan people and not with African or Muslim people.
Lumia
http://onomastica.mailcatala.com