the cave (? < Odhbha, nach léir brí dó)
Tá de chosúlacht idir An Uaimh agus B, PO Ceanannas (q.v.) gur athraíodh an t-ainm Béarla a bhí ar an dá bhaile i dtosach an 20ú haois. Is amhlaidh a cuireadh An Uaimh in ionad Navan sa bhliain 1922. Cuireadh Navan ar ais i 1970. Dealraíonn sé, óna bhfuil scríofa ag Diarmuid Ó Murchadha in alt dar teideal ‘Odhbha and Navan’ san irisleabhar Ríocht na Mídhe (1992–3), gur as an sean-logainm Odhbha a tháinig An Uaimh. Seo achoimre Uí Mhurchadha ar éirim na haiste s’aigesean:

The moat near Navan was originally a prehistoric burial mound called Odhbha. In early Christian times it was used as a fortified residence by local Gaelic tribes and from the ninth century occasionally by Vikings. The Normans made it into a motte and bailey fortification in 1176. A 12th century monastery built near it adopted its name, (n)Odhbha(n), as Novan, and this became the recognised name of the nearby town in Latin and English, changing to Navan in the 16th century. Speakers of Irish replaced Odhbha with a slightly different word, *An Uamha* or *An Uaimh*.