Etymology and distribution of 通縁.

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

Aomori-ken , Iwate-ken , Hokkaidou . Terrain . From the western pavilion. I tell Aomori-ken Hirosaki-shi that one Machida has said in 1713 (Masanori 3 years). 一町田 Itchouda reference.

※ Miyagi-ken tells that it is from Miyagi-ken Motoyoshi-gun West Bldg. Period, location unknown.