A male given name of Greek origin, traditionally used as a person's first name.
From Greek Dionysios, meaning 'devoted to Dionysus' (the god of wine). The name traveled through Latin (Dionysius) and French before becoming the English form Dennis. Over time, it became a common personal name across English-speaking cultures.
Dennis was hugely popular in the mid-20th century—if you look at old class photos, you'll find multiple Dennises in the same classroom! The name's connection to Dionysus, the party god, makes it fitting that it became so socially prevalent during decades of cultural celebration.
Complete word intelligence in one call. Free tier — 50 lookups/day.