However, most of the other family trees show that the Nagao family established in Shimousa Province as a branch family adopted a child from the Uesugi family, and the Echigo Nagao clan had almost no direct relationship (a line of Kagetame NAGAO or Kageyoshi NAGAO).
しかし、他の系図では上杉家から養子を迎えたのは下総に分家した長尾であって、越後長尾氏には直接関係無いとする系図がほとんど（長尾景為或いは長尾景能の流れ）である。