Thorfinn Karlsefni (
Old Norse:
Þorfinnr Karlsefni,
Icelandic:
Þorfinnur Karlsefni), whose signifies "Makings of a man", was an
Icelandic explorer. Around the year 1010
AD, he followed
Leif Eriksson's discovered route to
Vinland (
Newfoundland and Labrador, Canada, or perhaps further south), in a short-lived attempt to establish a permanent settlement there with his passengers and crew.