What does Merwyn mean?
Merwyn /mer-wyn/ [2 sylls.] 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 the previous year), Merton, Mervin and Mervyn are the popular alternative forms of Merwyn (outside Top 1000) rated in the Top 1000. Usage of these boy names was at its most widespread during 1920-1929 (usage of 0.485%) and is now significantly less (usage 0.127%, down 73.8%), with the forms Marvin, Merton and Mervin becoming less trendy. (2014 Birth Statistics)