Depiction of fighting Cham naval soldier against the Khmer, stone relief at the Bayon
(Cham people are surely Austronesian just like Reglai, Jarai, Rede, etc)
some of them somehow ended up in Malaysia and Indonesia bringing with them the haplogroup O2a1 (M95) wich is more prevelant in...
you might want to check on Champa my friend....
The Muslim Acehnese people of Aceh, Sumatra, Indonesia, are the descendants of Cham refugees who fled after defeat by the Vietnamese polity in the 15th century. wikipedia : Chams
Folklore traces this to five masters, namely Ninik Datuak Suri...