赵成侯 / Marquis Cheng of Zhao
赵成侯 / Marquis Cheng of Zhao appears in 《资治通鉴·周纪》10丨 以家族单位 有蚂蚁吃大象的精神（1） as Zhao Zhong, who succeeds after 赵靖侯 dies in 375 BCE. The source treats this as one of 周烈王’s first-year notices.
The page is source-scoped. Zhao Chenghou matters here because the following fourth-year notice shows 赵国 taking an energetic posture against 魏国 soon after the succession.