Pure
Katheleen is a rare variant of Kathleen, which is the Anglicized form of the Irish name CaitlΓn. It ultimately derives from the Greek name Aikaterine, though its exact etymology is debated, it has been associated with the Greek word 'katharos' meaning pure since the early Christian era.
Less common today
Katheleen isn't in the latest US Top 1000. It last peaked at #7,475 in 1991.
US births per 5-year period, 1990βpresent (SSA data).