 He also wrote various other tracks using his real name, including Björgvin Halldórsson's "Hjá mér um jólin" .Using the pseudonym SiRiS, he has composed songs for leading artists in Iceland as well as for artists abroad.Among Icelandic artists, he has written for Dísella Lárusdóttir, Steinar, Yohanna, Íris Hólm, Ragnheiður Gröndal, Kalli Bjarni, Aron Hannes, Birgitta Haukdal, Eiríkur Hauksson, Magni Ásgeirsson, and Björgvin Halldórsson.