mōnaþ m (nominative plural mōnaþas or mōnaþ)
See manian.
monaþ
From Proto-Germanic *mēnōþs, from Proto-Indo-European *mēnōt- (“month, moon”) < *mḗh₁n̥s. Cognate with Old Frisian mōnath, Old Saxon mānuð, Dutch maand, Old High German mānōd (German Monat), Old Norse mánaðr (Danish måned, Swedish månad), Gothic 𐌼𐌴𐌽𐍉𐌸𐍃 (menoþs).