Koni is a unisex given name of unknown origin, though it may have Hebrew roots, possibly meaning 'twin' or being an abbreviation for names such as Konstance or Konstantin. It was popularized by the American writer and conservationist Koni (Cornelia) Ausburn, who wrote under the pen name Koni.
The name Koni experienced a significant rise in popularity between 1952 and 1964, with a notable peak of 28 births in 1964. However, after this period, the number of births significantly decreased, with fewer than 10 births per year from 1965 onwards. There was another slight increase between 1970 and 1972, but overall, the name Koni became much less common towards the late 1970s and 1980s.