Katleen is of Dutch origin, meaning 'pure'. It's a variant spelling of Catherine, which itself means ' pure' in Greek. In some parts of Europe, particularly the Netherlands and Belgium, Katleen is a popular feminine given name. Pronounced /kəˈtiːlən/, it follows the stressed syllables pattern common to Dutch names. Its popularity has declined slightly over time but remains relatively steady compared to many other names. The name has no specific association with any season or month, making it versatile for births throughout the year.
"Katleen was a popular name among parents from the 1940s to the early 2000s, with peaks in usage around 1953 and 2000."