The Nagatani family, which claimed to be descended from the Kanmu-Heishi (Taira clan) TAIRA no Takamune-o line, belonged to the Tosho-ke (the hereditary lineage of Court nobles occupying relatively high ranks); the founder of the family was Tadayasu NAGATANI (Shosanmi Minbu taifu, or Senior Third Rank, Senior Assistant Minister of Popular Affairs) (1612 - 1669), who was the fifth son of Tokiyoshi NISHINOTOIN (Junii Sangi, or Junior Second Rank, Councilor) (1552 -1640).
長谷家（ながたにけ）は桓武平氏高棟王流で、西洞院時慶（従二位・参議）（1552年-1640年）の五男長谷忠康（正三位・民部大輔）（1612年-1669年）を祖とする堂上家。