From Proto-Tungusic *ʒapkun. Cognate with Evenki дяпкун (ʒapkun), Oroqen dʒapkʊn, Negidal ӡапкун, Manchu ᠵᠠᡴᡡᠨ (jakūn), etc.
дяпкан (ʒapkan)