Kathleen

Meaning & origin

Kathleen is a classic Irish-derived name that enjoyed immense popularity in the United States during the mid-20th century. In 2025, the name ranks 1150th, with approximately 1 in every 7,996 girls receiving it, a marked decline from its peak in 1949. That year, Kathleen was at its most fashionable, ranking among the top names nationwide. Its trajectory has been falling since 1986, reflecting a shift away from mid-century favorites. The name has been most concentrated in the states of Pennsylvania, Massachusetts, and Ohio. Although its usage has waned, Kathleen retains a gentle, dignified charm, anchored by its long history as an Irish form of Katherine. Its decline mirrors the broader trend of traditional names giving way to more modern creations, yet it endures as a timeless choice for many families.

Kathleen is the Anglicized form of the Irish Caitlín, pronounced 'KATH-leen', which is a Gaelic derivative of the name Katherine. The ultimate origin of Katherine is uncertain; it may derive from the Greek Aikaterine, but the meaning is debated, with a popular association with the Greek 'katharos' meaning 'pure'. The name was introduced to Ireland through early Christian influences and became popular as a native Irish form. Kathleen was later adopted into English usage, particularly from the 19th century onward, and gained widespread popularity in the United States during the mid-20th century.