A ruler/prince/
monarch/chief of of specific areas of the
Philippine Archipelago throughout Philippine History.
It can also be defined as the state of being "rich."
e.g
Rajah Sulayman
Rajah Matanda
(Desclaimer: These badboys took the title as "Rajah" which is just a synonym of "Datu."
e.g
Datu ah sa
buang oi!
This crazy guy is rich!