Etymology and distribution of 天國.

Amakuni 【天國】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Tochigi-ken Ashikaga-shi , Gunma-ken , Saitama-ken . Tochigi - ken Ashikaga - shi Rose - cho is based. It was in the Edo period in the same place. There is a 相場 surname on the same place. 相場 Aiba reference.