Courtly, polite, or from the short lake
A modern American invention, Kortlynn likely combines the Dutch-derived 'Kort' (meaning short) or the English 'Court' (referring to a courtly or polite person) with the popular 'lynn' suffix (meaning lake). It is often chosen for its contemporary sound and unique spelling.
Less common today
Kortlynn isn't in the latest US Top 1000. It last peaked at #9,453 in 2011.
US births per 5-year period, 1990βpresent (SSA data).