The Japanese surnames etymology dictionary.
① Fukushima-ken Futaba-gun Near the Naraha-machi (formerly Shiratado) is a place name with a record in the Heian era. Most of Ibaraki-ken is Hakuta. Ibaraki-ken Tsuchiura-shi Central was in the Edo period in the Tsuchiura clan of the clan government.
② Abstract . Abbreviation for Hatakeyama. In Ishikawa-ken northern part (formerly Noto-ku), tell him that you disassembled Hatakeyama's "Hatakeya" and disguised it. Estimated in the Azuchi Momoyama period. 畠山 reference.