Interesting one of a kind sword.
NW Borneo seems a probable origin based on the different influences.
What is strange is that except Iban/Sea Dayak (Langgai Tinggang blade) and Moro (Barong hilt) it also has (Borneo) Malay motifs on the blade?
So 3 different ethnic groups merged in one sword!
A wild guess would be that it belonged to an Iban Dayak who went on raids together with Moros and then later converted to Islam (which made him change the hilt and add the motifs to his blade)
Michael