An alternate story says that he was born in Enshu Hamamatsu and was named Hachiro SANADA, but he was renamed Goemon ISHIKAWA by a doctor family named Kotei YAMAUCHI in Ishikawa county, Kawachi province.
また遠州浜松生まれで、真田八郎と称したが、河内国石川郡山内古底という医家により石川五右衛門と改めたという説もある。