Family name Hallyn (Hallyn 
) , worldwide, is a very rare cognomen. The family name Hallyn is characteristic of Belgium, where it is a rare surname, and the United States, where it is an extremely rare surname. Likewise, Hallyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hallyn | Brazil, Belgium, United States, Philippines |
| fernand hallyn (b. 1945) |
|
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| serge hallyn Ph.D. College of William and Mary 2003 |
|