AnIs í an cúigiú litir den aibítir [[Ogham|oghaim]] is eaan '''Nion''' ([[Sean-Ghaeilge]] '''Nin'''<ref>[http://dil.ie/33186 1 nin] ar eDIL</ref><ref name=gabhal>[http://dil.ie/33187 2 nin] ar eDIL, píce, gabhal</ref><ref name=tonn>[http://dil.ie/33188 3 nin] ar eDIL, tonn</ref>). Is í an cúigiú litir den Aicme [[Beith (ogham)|Bheithe]]. Is é {{IPA|[n]}} a luach foghraíochta. Cuireann an focal 'nin' i leith na litreach áirithe 'Nin', agus araon i leith litreacha an Oghaim i gcoitinne.
