Pure lake or waterfall
A modern American compound name combining Katie, a diminutive of Katherine meaning 'pure', and Lynn, which stems from the Welsh word for 'lake'. While Katie has Greek roots, the suffix Lynn adds an English or Welsh nature-inspired element. It represents a blend of traditional nickname charm with a mid-century compound style.
Less common today
Katielynn isn't in the latest US Top 1000. It last peaked at #6,159 in 1995.
US births per 5-year period, 1990βpresent (SSA data).