Sone 【僧根】2 The Japanese surnames etymology dictionary.
Gunma-ken Tomioka-shi , Saitama-ken , Toukyou-to . Gunma-ken Tomioka-shi Birth of Nakazawa. A place name with a record since the Edo period. Nagano-ken Chiisagata-gun Nagawa-machi I tell him that he came from Furuicho in 1553 (Astronomy 22) and added Nakazawa's " Tsuru " to Tsugane of the last name. 津金 reference.