What does Merwyn mean?
Merwyn /mer-wyn/ as a boys' name. Merwyn's roots are Welsh, Old English and Old Welsh, and the name Merwyn means "sea friend; town by the lake". Merwyn is a variant form, with the prefix Me-, of Marvin (Welsh): version of Mervin. Merwyn is also a form of Merton (Old English): place name.
How popular is Merwyn?
Merwyn is an uncommon given name for males. Merwyn is also a rare last name for both adults and children. (2000 U.S. Census)
Below is a charted analysis of the usage of the boy name Merwyn and related names. Marvin (#492 2 years ago), Merton, Mervin and Mervyn are the popular alternative forms of Merwyn (outside Top 1000) rated in the Top 1000. Usage of these forms of Merwyn was at its most widespread during 1920-1929 (average #515) and is somewhat lower today (#873, down 73.8%). (2014 Birth Statistics)