So your ancestors were not Vikings?  They were the longest slave owners.  

How about in more modern times?

UNESCO cites the Norwegian slave ship "  Fredensborg", which went down on December 1st, 1768. 

"Norwegians like to think that slave-trade was 'none of our business'. However, Mr. Leif Svalesen's studies of the slave ship "Fredensborg" does definitely 'kill' that misconception. Norwegians transported slaves, manned the slave forts and carried the goods which were produced by the slaves."

"The recovery of items from 'Fredensborg' did really visualize this trade. The divers found teeth from hippos and elephants, and during the final dives, also chains from the slaves."

"The Danish-Norwegian slave trade brought approximately 100.000 Africans to the New World as slaves."


http://www.vgskole.net/prosjekt/slavrute/frbrg_en.htm