Lieutenant Colonel of army Shigeru NAGATA, who was his fourth younger brother, died from hard military service in his early 40th ("Nihon no meike, Meimon jinbutsu keifu soran" [Japanese famous family, genealogy disturbance of noted family]).
四弟永田茂陸軍中佐は軍務での無理がたたり40代前半で死去（『日本の名家・名門人物系譜騒乱』）。