What does Catuvolcus mean in Latin?

Catuvolcus, a proper noun, means “king of half of the country of the Eburones, while the other king was Ambiorix”.

What is the genitive of Catuvolcus?

The genitive singular is Catuvolcī. Catuvolcus is masculine, second declension.

In classical Latin, [ka.tʊˈwɔɫ.kʊs]; in ecclesiastical (church) Latin, [ka.tuˈvɔl.kus].

proper noun · masculinesecond declension

Catuvolcus m sg (genitive Catuvolcī)

Classical[ka.tʊˈwɔɫ.kʊs]Ecclesiastical[ka.tuˈvɔl.kus]

masculinesingularking of half of the country of the Eburones, while the other king was Ambiorix
Unam legionem, quam proxime trans Padum conscripserat, et cohortes V in Eburones, quorum pars maxima est inter Mosam ac Rhenum, qui sub imperio Ambiorigis et Catuvolci erant, misit.One legion which he had raised last on the other side of the Po, and five cohorts, he sent among the Eburones, the greatest portion of whom lie between the Meuse and the Rhine, [and] who were under the government of Ambiorix and Catuvolcus.c. 52 BCE, Julius Caesar, Commentarii de bello Gallico 5.24

Of Celtic/Gaulish origin, from cattos (“battle”) + *wolkās (“hawk”), from Proto-Celtic *katus + *wolkos.