The Japanese surnames etymology dictionary.
② Kagoshima-ken Ooshima-gun Tatsugou-chou Origin of the Tatsugo (Tatsugo) origin. A place name with a record since the Edo period. First letter surname of Amagi archipelago of Kagoshima-ken who changed from Tabata surname using Tatsuto 's "dragon". 田畑 reference.
③ things . Shiga-ken Ootsu-shi Fishes of the elephant's skull, which farmers excavated during farming in 1804 (the first year of culture) in Ichinari-Minamijo Town became a rumor that it is a dragon's bone Shiga-ken Ootsu-shi Honmaru cho I gave it to the clan lords of the clan government that it was given to the lord.