You're right the Moors as a group varied in their numbers throughout the 800ish years of what is considered their rule of Spain.

Historically, both the Arab muslims and Berbers were never particularly known for their stable, expansive empires. So, those that did stay after the conquest of Spain/Portugal, had to make do virtually on their own. Those that couldn't left.

But considering 800 years, average lifespan of 35ish, that is 23 generations of interbreeding...

Also this is during the end of the Middle ages, and I have no idea as to the efficacy of efforts to expel a people (I know this was about the time of the Reconquista but that would just add to the chaos).

edit: and later the Inquisition.

You're right the Moors as a group varied in their numbers throughout the 800ish years of what is considered their rule of Spain.

Historically, both the Arab muslims and Berbers were never particularly known for their stable, expansive empires. So, those that did stay after the conquest of Spain/Portugal, had to make do virtually on their own. Those that couldn't left.

But considering 800 years, average lifespan of 35ish, that is 23 generations of interbreeding...

Also this is during the end of the Middle ages, and I have no idea as to the efficacy of efforts to expel a people (I know this was about the time of the Reconquista but that would just add to the chaos).