The trouble is, there is no Indonesian naming system. The islands are divided into over 400 tribal groups, each with its own naming system, sometimes more than one, depending on what level of society you come from. People use a variety of forms of their name to refer to themselves, eg a Balinese of low caste (they are Hindus) may have the name I Nyoman Sudarma. The I is his caste title, Nyoman is his position name and Sudarma is the name he is generally known by. There is no surname, no clan name. He may call himself Darma. His friends might call him Nyoman or Man. His colleagues might call him Pak Man (Mr Man- nothing to do with the computer game lol). Others might refer to him as Bapak Mara (father of Mara, his firstborn child).
There are four castes in Balinese Hinduism. They each have their own naming systems.
Then turn to the Javanese. Most have only one name eg Sukarno (the su tells me he is a minor noble) or Hartono (a commoner) unless they are high aristocracy where things become extremely complex as to whether they are descended through which wife (multiple marriages) and so they get what prefix in front of their name. When you get to the kings they have a birth name, and a throne name (and can also be known by several versions of it). They can also be referred to by any number of official nicknames. see https://id.wikipedia.org/wiki/Gelar_kebangsawanan_Jawa
for the complexity of the system.
Women are often simply referred to as "wife of..." so it is rare to know the names unless they are daughters of important nobles or kings of other dynasties.
In Sumatera, there are four or five major tribes, each with their own systems. The Batak tribe has a clan system, whereby you can identify wife giving and wife taking clans by their surnames. Many Batak are Christian, so might have Biblical first names.
On top of this, there are the Arabic names being assumed by more and more people throughout the islands, and the Chinese names. Many Chinese also assumed Indonesian names during the persecutions of the 60s, which, to outsiders, might resemble aristocratic names, but are generally translations of their Chinese names into javanese. Some Chinese modernised their names eg So Tek Haw (aka Henry to his friends) called himself Henry So.
This is the dilemma of doing Indonesian genealogy. And most indonesians are not interested in it, unless they are descended from the aristocracy of their tribe. Before Independence (1945),there aren't records for anyone but the upper classes anyway, so most people can only trace their familes to the late 1800s.
I think I have got a system of fitting the names into the Wikitree model for the Sultans and Rajas, and for the aristocracy, but it is a forced one. It is of no use to anyone wanting to look at the lineage of the Sultans of Yogya to have to search through their birth names, which are completely different and unrecognisable as belonging to the ruler whose name they do know. I have listed their position "Sultan of Yogyakarta" as current surname, so it can be searched. I have given their throne name as birth name and their birth names as other surnames. This works for the Muslim Sultans and Hindu kings of Java.
I also have a system going for the princes and high aristocracy. I might have to discuss with the gentleman who began the work, whether or not we have to redo Sukarno's profile, as he is hard to find as Sukarno, the name most people would know him by.
If the site is going to cater for non European genealogy, we are going to have to give more options for recording names and be more flexible with the terminology. It is a challenge indeed.