European serfdom was part of feudalism, which did not exist in the pagan lands of the Vikings until the coming of Christianity, at with time the Viking age was pretty much over. So, if there were serfs, they were not Vikings. The Vikings owned slaves, but the slaves were not Vikings, and they were also not serfs.
A legal conflict between a serf living on a manor with another serf is resolved by the Lord of the Manor or by a court system of sherriffs and bailiffs. Before this, conflicts were settled through parties beating each other.
Peasant
A peasant who is bound to land is a serf, while a fief is an estate granted to a vassal.
A piece of land granted by one lord to another was called a
hard working people
Whats serf
The homonym for "serf" is "surf."
Your question is not entirely correct in its premise; a serf is not a slave and does not have an owner. A serf is a subject of a land owner whom the serf would address as lord.
In a feudal system, a serf would remain a serf no matter how hard they were to work.
Saint Serf died in 583.
Saint Serf was born in 500.
Riddle answer: a serf board.
Peasant/serf
The plural of the word "serf" is "serfs."
The noble executed the serf.
I doubt that they thought about the serf one way or the other. The serf was to do the work and didn't require much thought from his master.
It is probably safe to say that anyone who was a serf was also poor.