Kukeng was formerly named Ankukeng, which means "a warm old nest." It is said that there used to be a husband and wife living here, who made their living by working iron. Very much in love all their lives, they were envied by their neighbors. The place where they lived was nicknamed: "Marital Blissville" in Taiwanese.
古坑舊名「庵古坑」，意為「溫暖的古窩」，傳說此地曾有一對以打鐵為生的夫婦，終其一生恩愛非常，當地居民十分羨慕，乃稱所住之處為「尪婆仔坑」。