His real name appears as Nagasada in "Kansei Choshu Shokafu" (Genealogies of Nobilities Compiled in Kansei Era), and while some say it is Nagayasu, Naritoshi is the only verifiable name in materials written during his days.
諱は『寛政重修諸家譜』に長定（ながさだ）とあり、他に長康とする説もあるが、活躍当時の文書で確認出来るのは成利である。