From <span class="searchmatch">Proto</span>-Indo-European *h₁newn̥(n)ós, a thematization of *h₁néwn̥. *<span class="searchmatch">nowVnos</span> ninth Latin: nōnus (see there for further descendants) South Picene: 𐌍𐌏𐌞𐌝𐌍𐌉𐌔...
Secondarily created by analogy to *septVmos and *<span class="searchmatch">nowVnos</span>, displacing older <span class="searchmatch">Proto</span>-Indo-European *deḱm̥tós > *dekəntos, which survived separately in Oscan...
From <span class="searchmatch">Proto</span>-Indo-European *h₁néwn̥. *nowən nine Latin: novem (see there for further descendants) >? Umbrian: 𐌍𐌖𐌅𐌉𐌌 (nuvim) (if not related to *nowos...