What does Alāzōn mean in Latin?

Alāzōn, a proper noun, means “the Alazani or Qanıx (a river in Caucasian Albania)”.

What is the genitive of Alāzōn?

The genitive singular is Alāzonos. Alāzōn is masculine, third declension.

In classical Latin, [aˈɫaːz.zoːn]; in ecclesiastical (church) Latin, [aˈlad.d͡zon].

proper noun · masculinethird declension

Alāzōn m sg (genitive Alāzonos)

Classical[aˈɫaːz.zoːn]Ecclesiastical[aˈlad.d͡zon]

the Alazani or Qanıx (a river in Caucasian Albania)
nec procul albentes gemina ferit aclyde parmas, // hiberni qui terga Novae gelidumque securi // eruit et tota non audit Alazona ripa.AD 70–79, Gaius Valerius Flaccus (author), Otto Kramer (editor), Argonautica (C. Valeri Flacci Setini Balbi Argonauticon Libri Octo, 1913), book VI, lines 99–101
Planitiem omnem a Cyro usque Albanorum gens tenet, mox Hiberum discreta ab his amne Alazone in Cyrum Caucasis montibus defluente.All the plain from the Kur onward is occupied by the race of the Albani and then that of the Hiberes, separated from the Albani by the river Alazon, which flows down from Mount Caucasus into the Cyrus. ― translation from the same source, page 359AD 77–79, Gaius Plinius Secundus (author), Harris Rackham (translator), Naturalis Historia, book VI, chapter xi, § 29 (volume II [1942], page 358)

ălāzōn, ŏnis, m., = ἀλαζών (boasting),

I. a braggart, boaster, Plaut. Mil. 2, 1, 8.

Ălāzon, ŏnos, m.,

I. a river in Albania, now Alasan, Plin. 6, 10, 11, § 29; Val. Fl. 6, 102.