Thread:Vengatio1/@comment-31524231-20190707203627/@comment-3327080-20190718125531

You disagree Ryutama (流玉), so:

The name "Ryūkyū" originates from Chinese writings. The earliest references to "Ryūkyū" write the name as 琉虬 and 流求 in the Chinese history Book of Sui in 607. It is a descriptive name, meaning "glazed horn-dragon". (Wikipedia)