The Oki clan is a descendant of Munemitsu OKI who served Naoshige NABESHIMA later in life and was a senior vassal of Shigenami KAMACHI, a descendant of Hisanori KAMACHI who was Tomotsuna's elder brother.
大木氏は、資綱の兄の蒲池久憲の後裔の蒲池鎮漣の重臣で、のちに鍋島直茂に仕えた大木統光の子孫にあたる。