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天龍 can mean Heavenly Dragon (Dragon of Heaven), Sky Dragon, Holy Dragon, Celestial Dragon, or Divine Dragon.
This can be a given name in both China and Japan (天龍 is pronounced Tenryū and sometimes written 天竜 in Japanese).
In an older Buddhist context, this can refer to Brahma, Indra, and the devas, together with the nāgas. It can also refer to celestials and snake spirits.