He was educated at Konghelle (Kungahälla) in  Bohuslän (Båhuslen) which at that time a royal center of the Kingdom of Norway. Jón Loftsson was married to Halldóra Brandsdatter with whom he had several children.
Jón Loftsson received his education at Konghelle (Kungahälla) in Bohuslän (Båhuslen), which was a significant royal location within the Kingdom of Norway during that era. He later married Halldóra Brandsdatter and had several children.