Aulus Gellius
Aulus Gellius, in the "Noctes Atticae", written almost a millennium after; speculated that Vejovis was an ill-omened counterpart of Jupiter; compare Summanus. Aulus Gellius observes that the particle "ve-" that prefixes the name of the god also appears in Latin words such as "vesanus", "insane," and thus interprets the name Vejovis as the anti-Jove.