Exoniensis (usually abbreviatedExon.) is theLatinadjectival form ofExonia, the Latin name for the city ofExeter in Devon, England. It therefore means "of Exeter".

The Latin nounExonia has as its genitive formExoniae, meaning "of Exeter", which may also be expressed by the adjectiveExoniensis, also meaning "of Exeter", which declines liketristis, triste, "sad".^[1] The usage may be compared with the common usage in Classical Latin literature ofCarthago, genitiveCarthaginis, the city ofCarthage, with its adjectival formCarthaginiensis.^[1]

It is thus used in the modern age in formal ecclesiastical and academic Latin contexts, most commonly as thepost-nominal suffix given tohonorary andacademic degrees from theUniversity of Exeter and of even more ancient origin as the official signature of theBishop of Exeter, who signs with his Christian or forename followed by the wordExon. In this way, it is comparable with "Oxon.", abbreviated fromOxoniensis, referring to theUniversity of Oxford and "Cantab.", abbreviated fromCantabrigiensis, forUniversity of Cambridge. A graduate of the University of Exeter is called an "Exonian", a mixture of the Latin noun with an English adjectival word ending, although other institutions, such asPhillips Exeter Academy, also use this term.

• University of Exeter
• Exeter
• Bishops of Exeter
• People associated with the University of Exeter
• Alumni of the University of Exeter

• Use dmy dates from December 2016
• Use British English from December 2016