Catharin / Katarina / Caterina / Ekaterina

Catharin is an older form of the name Katherine, which derives from the Greek name Aikaterine. The etymology of Aikaterine is debated, but the most widely accepted theory links it to the Greek word 'katharos' (καθαρός), meaning 'pure'. This association was popularized by the veneration of Saint Catherine of Alexandria, an early Christian martyr.

The name spread throughout Europe during the Middle Ages, particularly due to the cult of Saint Catherine. Various spellings and pronunciations emerged across different languages. 'Catharin' represents one of these earlier English or Latinized forms, predating the more common 'Catherine' or 'Katharine' spellings.