mirandria et mirabundria

Latin Medieval and Neo-Latin
1

These seem to be plural nouns derived from mirandus and mirabundus. I guess they mean something like ‘wondrous things’ but I have not found them in any dictionaries. Do you know about other nouns derived from adjectives with this ending?

The phrase “mirandria et mirabundria” appears in a fictitious letter attributed to abbot Paul Bachmann in a pamphlet titled Mors et sepultura doctrinae Lutherianae (republished in Neues Archiv für Sächsische Geschichte und Altertumskunde 26: 39-40).

Both singular “mirabundrium” and plural “mirabundria” appear in Materia Mere Magistralis (XXX & CXXVI),

Mirabundria also appears in Themata Medica De Beanorum (XVIII) and Strena boni ominis et sanioris mentis gratia.

The texts of Materia Mere Magistralis and Themata Medica De Beanorum are republished in Facetiae facetiarum.

Mirabundria is also found in Kepler’s Gesammelte Werke, Band XVIII, p. 136:
S. P. Etsi hisce nundinis ab Exc. T. nihil mihi literarum, tamen tacere meum non est, sed agere gratias pro communicatis Kepplerianis. Mirabundria sunt (ajebat Italus iste) ut vir ipse. Videor mihi quotiescunque talia et alia Keppleri lego, nescrio quorsum extra me abripi.

2

It seems mirandria et mirabundria are simply miranda et mirabunda after the syllable -ri- has been added. Something similar happens to many verbs in the text, which are routinely made longer by adding the syllable -is-, or something close to it (scripsare, declarisare, vexissare, amatisare, laudisare,…).

And there are many other abnormal Latin forms (profundosissimus, professator, gaudiuit & ammirauit,…).

The whole text reads like a joke, so I think these words are just the author’s way of having fun.