Etymology and distribution of 杦平.

Sugihira 【杦平】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Tochigi-ken Oyama-shi . A variant of 田名網 . Tochigi - ken Oyama - shi In Minami - kobayashi told that it was renamed from Tanami surname in the Edo period. 田名網 Tanaami reference.