Family name Friðleifsson (Friðleifsson 
) , worldwide, is a very rare cognomen. The cognomen Friðleifsson is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Friðleifsson | Iceland |
Gunnar, Jóhann, Brynjar, Guðmundur, and Friðleifur