Here is a notion, fanciful too..let me have my dreams for a moment
With the translation that has been offered, could the word Jamil actually be Amil as in Datu Amil from the Sulu regions noted in Fultons work?
Finding such note worthy script on a spear or any Moro weapon for that matter must have a great importance and Amil was of the new school of thought were others were considered old school, perhaps a change that was note worthy enough to show on a spear and the spear being the king of weapons....let the dream stay for a minute before you all come firing in...
Gav