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Family name Merfyn (Marvin
, Mervyn
, Merfyn
) , throughout the world, is a common cognomen. The surname Merfyn is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a common surname, Honduras, and Venezuela, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Honduras, Nicaragua, and the United States. More frequently, Merfyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marvin | Honduras, Philippines, Guatemala, United States, Nicaragua |
| Mervyn | Honduras, Philippines, United States, Nicaragua, Kenya |
| Merfyn | Canada, India, New Zealand, United States, United Kingdom |