Oya 【屋家】1 The Japanese surnames etymology dictionary.
① Topography . From oak and rice. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office. Good neighbor . Shiga-ken Ootsu-shi There is a distribution in the Prince Higusa .
② things . Toukyou-to Chiyoda-ku Chiyoda was in the Edo era as the shogunate of the Edo shogunate of the government agency. The shogun tells that he added trees to "Kudo" of Katada surname. 堅田 reference.