Kagawa 【香河】3 The Japanese surnames etymology dictionary.
Tokushima-ken · Oosaka-fu · Hokkaidou . There is a word in a word meaning "corner". In Hyougo - ken Hiroshima - ken Kure - shi Toyotomachi Ota comes out and tells that Kato surname changed to pronunciation from Kato in Kawatari by confusing thing. Estimated in the Tokyo era.