A horse. This is an example of n of the article joined to the following noun, as in the word newt = an ewt. (Danish and Norwegian, og; Anglo-Saxon, eoh or eh; Latin, eq[uus]; Dutch, negge.) Taylor (1630) has naggon, as-
Wert thou George with thy naggon, That foughtest with the draggon.
Shakespeare's naunt and nuncle are mine-aunt and mine-uncle.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894