Diminutive of Dennis, itself from the Greek Dionysios, the god of wine and festivity. Used as a standalone given name occasionally, especially in mid-century English-speaking countries.
Nicknames
den · denny
Vibe
gentle
How it ages.
Feels informal and mid-century; unlikely to be chosen as a formal given name now.
The cultural moment.
Occasional use in the US and UK from the 1940s through the 1970s.