What does Mĕnestheus mean in Latin?

Mĕnestheus, a proper noun, means “a man's name”.

Mĕnestheus — meaning & declension

Mĕnestheus (-steus), ei and eos, m., = Μενεσθευς,

I. a man's name.

I. A son of Iphicrates the Athenian, Nep. lphicr. 3.—

II. A king of the Athenians, a leader in the Trojan war, Just. 2, 6.—

III. A charioteer of Diomedes, Stat. Th. 6, 661; 712.—

IV. = Mnestheus, q. v.