It is amazing that someone has not yet deciphered Soebarkah. I have been to a few foriegn countries and for instance in India a name can tell a person of know where that person was from. So there must be a reason for the combination of SOEtoro BARaKah. It would be telling IMO if we understood how that name was developed.
Forgot to include in the above...
I don’t see how or why one might assume there was ever a ‘combination of SOEToro and SOEbarkah’ - why would the two distinctly different names belong to the same individual? Besides, Lolo already had enough names, if you can believe wiki:
Lolo Soetoro, also known as Lolo Soetoro Mangunharjo[1][2] or Mangundikardjo,[3]
It really hasn’t been researched thoroughly, because we have no one who understands the language, nor the naming conventions.
There are no shortages of SOEBARKAH if you look at Google.