Save Gender Masculine Usage Germanic [1] Meaning & History From the Old German elements atto meaning "father" and helm meaning "helmet, protection". Related NamesFamily Tree·Details Rootsatto + helmOther Languages & CulturesAdelmo(Italian) Adelmo(Portuguese (Brazilian)) Adelmo(Spanish (Latin American)) Categories defence, family, isograms, protection Sources & References Förstemann, Ernst. Altdeutsches Namenbuch. Bonn, 1900, page 156.
