Tony Jones, I think you've been missing my point this whole time. In the 6th century, or maybe(though...) even in anytime before 20th, the name "Sunda" was used only for the country of Sunda only, that is where the Kingdom of Sunda/Pasundan was located. But at least maybe since the beginning of 20th century, other than to refer the original Sundanese land, somehow the name "Sunda" began to be used also to refer some parts of Nusantara archipelago. And also, to mention the most important point that should be noted, there was never a Sundanese maritime empire (and this negates the historical validity!). Hence I found the use of "Sunda" to regard Indonesia Archipelago exclude Eastern Indonesian (Sulawesi, Maluku, Papua) isles in present time as a strange phenomena. Maybe it was the Dutch?
OK. So noted. So what name would you suggest, given that I think Nusantara would be excluded from consideration due to its links to Javanese domination of the region? Are there any alternative names for the Java Sea that might be appropriate?