The family owned land in Norway, as well as on the Faroe Islands and Shetland (which at the time was a Norwegian overseas possession).
[2] The coat of arms of the Smør-family had a blue background, and a golden Leopard's head under a red chevron.
[4] The latter Jon's son, Svale Jonson Smør, is one of the more well-known members of the family, becoming important in Norway during the early 15th century.
[6] One of Svale's children was Jon Svaleson Smør, also a knight, riksråd, and in 1482 was promoted to the highest title known of a member of the Smør-family, as he was elected regent of Norway in the midst of a two-year interregnum.
[1] As such, some Norwegians, especially in Western Norway, can trace their ancestry back to some of the members of the Smør family.