Can you give the Greek and Roman names for the God of Wine and Fertility?

The Greek god of wine, fertility, festivity, and ritual madness is known as Dionysus. He is a prominent figure in Greek mythology, often depicted as a youthful, vibrant figure, or sometimes as an older, bearded god. Dionysus is associated with the cultivation of grapevines and the creation of wine, bringing both joy and divine ecstasy, as well as sometimes brutal rage. His followers, including the wild Maenads and goat-footed Satyrs, engaged in ecstatic rituals and dances, often in wild, natural settings. Dionysus's birth is famously unusual, as he was "twice-born" from Zeus's thigh after his mortal mother, Semele, was consumed by Zeus's divine form.

The Romans adopted many aspects of Greek mythology, and Dionysus found his Roman equivalent in Bacchus. Bacchus is also the god of wine, agriculture, fertility, and revelry. While sharing many core characteristics with Dionysus, the Roman interpretation of Bacchus also overlapped with their existing deity, Liber Pater, who was associated with viticulture, wine, male fertility, and liberty. The name "Bacchus" itself was a Greek epithet for Dionysus, referring to the frenzied state he could induce, which the Romans later popularized.

Bacchus's festivals, known as the Bacchanalia, were celebrated with great enthusiasm and were initially private rites. However, due to concerns about their ecstatic and sometimes transgressive nature, the Roman state eventually sought to regulate these celebrations. Both Dionysus and Bacchus represent the liberating and transformative power of wine, offering an escape from societal constraints and a connection to the wilder, untamed aspects of nature. Their myths and cults highlight the duality of wine – its ability to bring pleasure and inspiration, but also madness and loss of control.