細川忠興
was a Japanese samurai warrior of the late Sengoku period and early Edo period. He was the son of Hosokawa Fujitaka with Numata Jakō, and he was the husband of a famous Christian convert (Kirishitan), Hosokawa Gracia. For most of his life, he went under the name of Nagaoka Tadaoki that had been adopted by his father and was related to a town that was in their domain. Shortly after the victory at Sekigahara, Nagaoka Tadaoki reverted to his original name Hosokawa Tadaoki.