Kathleen is of Irish origin, derived from the Gaelic 'Caitlín', which translates to "pure, chaste, innocent". It was originally a diminutive form of the Latin 'Catherine', meaning "pure" or "innocent". Kathleen gained significant popularity in the 19th century, notably due to its use by notable figures such as Kathleen O'Hara, an Irish nationalist and revolutionary. The name Kathleen is often associated with beauty, intelligence, and grace. It has been used extensively throughout history, appearing in literature and popular culture, further cementing its place as a classic, timeless choice for parents seeking a unique yet enduring name for their daughter.
"The name Kathleen has seen fluctuations in popularity over time. There were five girls named Kathleen born each in 1953 and again in 1958, indicating a slight resurgence in the popularity of this traditional Irish name."