Where does “Magindanaw” come from?

Magindanaw (Maguindanao) comes from Maguindanao maginged, from Maguindanao inged.

Ancestry of “Magindanaw”, step by step

Step	Language	Word	Meaning
1	Maguindanao	maginged	—
2	Maguindanao	inged	—