Cognomen Fjölnisdóttir (Fjölnisdóttir 
) , across the world, is a very rare surname. The surname Fjölnisdóttir is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Fjölnisdóttir | Iceland |
| maría björg fjölnisdóttir Icelandic association football player, IS |
|