Swedish musician (percussionist), born December 28, 1972.

He is best known as a percussionist in Håkan Hellström's backing band since 2001. He also works as a freelance musician and has worked with, among others, José González, Timbuktu, Fibes, Oh Fibes !, Timo Räisänen and Miriam Aïda.

Björnulfsson is one of Sweden's foremost practitioners of Brazilian percussion and samba music, which he also holds workshops in. He has also played with Brazilian samba schools.