Kathy, a diminutive of Katherine or Kathleen, is a popular given name for females. It originated from the Greek name 'Aikaterine', which means 'pure'. The name Kathy was particularly prevalent in the mid-20th century and has been consistently used since then.
The name Kathy experienced significant popularity between 1947 and 1967, with a peak of 50 births in 1957. However, its usage declined sharply afterwards, reaching as low as 5 births per year from 1978 onwards.