What does Istrī mean in Latin?

Istrī, a proper noun, means “A pre-Roman tribe settled in Istria”.

What is the genitive of Istrī?

The genitive singular is Istrōrum. Istrī is masculine, second declension.

In classical Latin, [ˈɪs.triː]; in ecclesiastical (church) Latin, [ˈis.tri].

proper noun · masculinesecond declension

Istrī m pl (genitive Istrōrum)

Classical[ˈɪs.triː]Ecclesiastical[ˈis.tri]

Istri (Histri), ōrum, m.,

I. the inhabitants of Istria, the Istrians, Liv. 41, 11; Plin. 3, 19, 23, § 129.—

II. Derivv.

A. Istrĭa (Hist-), a country of Italy, on the Adriatic Sea, and bordering on Illyria, Plin. 3, 19, 23, § 129; Liv. 39, 55. —

B. Istrĭ-āni (Hist-), ōrum, m., the inhabitants of Istria, Istrians, Juv. 9, 2, 1.—

C. Istrĭcus (Hist-), a, um, adj., of or belonging to Istria, Istrian: bellum, Liv. 41, 1; 41, 11: ostrea, Plin. 32, 6, 21, § 62. —

D. Istrus (Hist-), a, um, adj., Istrian: testa, i. e. Istrian oil in Istrian jars, Mart. 12, 63, 2.

From Ancient Greek Ἴστροι (Ístroi).