Real name: Erpur Þórólfur Eyvindarson

Erpur Þórólfur Eyvindarson (born August 29th, 1977) also known as Johnny National and BlazRoca, is an Icelandic rapper, visual artist, and television presenter.

One half of the duo Hæsta Hendin, he is the brother of rapper Sesar A (Eyjólfur Eyvindarson) and together they make up the duo Sækópah. He is also one of the band members of XXX Rottweiler Hundar, performing with lyrics in Icelandic. His 2011 solo album 'KópaCabana' is a dedication to Kópavogur, an infamous southern suburb of the capital city Reykjavík. The album was certified gold having exceeded 5,000 copies in sales.