Þangbrandr

Þangbrandr was a missionary sent to Iceland by king of Norway Óláfr Tryggvason to convert the inhabitants to Christianity. Snorri Sturluson described him as follows:

There was a Saxon priest in [Olaf's] house who was called Thangbrand, a passionate, ungovernable man, and a great manslayer; but he was a good scholar, and a clever man.
King Olaf Trygvason's Saga (80), Laing's translation