Da is Lap or Finnish; and Dana Da was neither Finn, Chin, Bhil...

When it was in thorough working order, with all the machinery down to the subscriptions complete, Dana Da came from nowhere, with nothing in his hands, and wrote a chapter in its history which has hitherto been unpublished. He said that his first name was Dana, and his second was Da. Now, setting aside Dana of the New York Sun, Dana is a Bhil name, and Da fits no native of India unless you accept the Bengali Dé as the original spelling. Da is Lap or Finnish; and Dana Da was neither Finn, Chin, Bhil, Bengali, Lap, Nair, Gond, Romaney, Magh, Bokhariot, Kurd, Armenian, Levantine, Jew, Persian, Punjabi, Madrasi, Parsee, nor anything else known to ethnologists. He was simply Dana Da, and declined to give further information. For the sake of brevity, and as roughly indicating his origin, he was called "The Native." He might have been the original Old Man of the Mountains, who is said to be the only authorized head of the Teacup Creed. Some people said that he was; but Dana Da used to smile and deny any connection with the cult; explaining that he was an "independent experimenter."

As I have said, he came from nowhere, with his hands behind his back, and studied the creed for three weeks; sitting at the feet of those best competent to explain its mysteries. Then he laughed aloud and went away, but the laugh might have been either of devotion or derision.

The Lock and Key Library by Egerton Castle et al.