Gnaeus Genucius Aventinensis, M. f. M. n., was a nobleman of ancient Rome of the Genucia gens. He served as consul in 363 BCE, in which year the senate was chiefly occupied in endeavoring to appease the anger of the gods, owing to the severe pestilence and flooding that Rome was suffering. To this end, Lucius Manlius Capitolinus Imperiosus was nominated to the office of dictator to perform the rite of clavum fingere to mollify the angry gods.