Short form of Eugenia or Geniveva; in Brazil functions as an independent name with strong associations to Chico Buarque's 1977 song 'Geni e o Zepelim'.
Vibe
strongplayful
How it ages.
Carries the Chico Buarque association permanently; culturally loaded but not currently fashionable.
The cultural moment.
Used in Brazil primarily mid-20th century; the song gave it lasting cultural resonance.