High tower or lake
A modern American blend likely combining the prefix 'Ma-' from names like Madeline or Mary with the suffix '-lynn'. It can be interpreted as 'high tower' from its Hebrew roots or 'lake' from its Welsh/English elements.
Less common today
Malynn isn't in the latest US Top 1000. It last peaked at #7,427 in 1991.
US births per 5-year period, 1990βpresent (SSA data).