Etymology and distribution of 古賀田.

Kogata 【古賀田】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Toukyou-to , Shizuoka-ken Mishima-shi · Yamagata-ken Yonezawa-shi . A variant of 三反崎 . Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office. The same clan says "Mikazaki" as well. Santanzaki is pronounced. Yamagata-ken Yonezawa-shi Marunouchi was in the Edo period in the clan of the Yonezawa clan in the clan office. The same clan says that Fukui - ken Eastern (formerly Echizen Country) comes out. 三反崎 Mitazaki reference.