John Scolvus or John of Kolno may have been a navigator of the late 15th century. According to some sources he was among a group of early Europeans to reach the shores of the Americas prior to Columbus, arriving in 1476 as steersman of Didrik Pining, although this view is not supported by contemporary evidence, and as he is not mentioned contemporaneously, his identity and even existence have been disputed.
John Scolvus as depicted by a statue from modern times in Szczecin, Poland with the Polish origin theory name rendering of Jan z Kolna.
Didrik Pining was a German privateer, nobleman and governor of Iceland and Vardøhus.
Figures from modern times (20th century) of Pining and his partner Pothorst by Bernhard Hoetger at the Bremen Böttcherstraße Haus des Glockenspiels. The image is based on the notion of them having reached America and also encountered a Native American.
Olaus Magnus' account is illustrated by one of his woodcuts (seen above), resembling the southern Greenland coast where Hvidserk is seen, and the explorers combating Eskimos.