What does errātor mean in Latin?

errātor, a noun, means “wanderer (also used as an epithet of the River Maeander)”.

What is the genitive of errātor?

The genitive singular is errātōris. errātor is masculine, third declension.

In classical Latin, [ɛrˈraː.tɔr]; in ecclesiastical (church) Latin, [erˈraː.tor].

noun · masculinethird declension

errātor m (genitive errātōris)

Classical[ɛrˈraː.tɔr]Ecclesiastical[erˈraː.tor]

wanderer (also used as an epithet of the River Maeander)
Maeandrōs, terrīs totiēns errātor in īsdem43 BCE – c. 17 CE, Ovidius, Heroides 9.55
...tiātōrem, errātōrem Catō in M.c. 2nd century, Sextus Pompeius Festus, De verborum significatione 344.34

errātor, ōris, m. id.,

I. a wanderer, Fest. p. 344, 34.—Transf., of the river Maeander: terris totiens crrator in isdem, Ov. H. 9, 55.

Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Latin errātor From errō (“to wander”) + -tor.