This profile has 111 managers and no sources, and has been marked with that comment since 2013. Can we fix that?
Sources in this case means positively identifying this person as mentioned in a saga or other piece of literature dated 1400 or before (most sagas were first written down in that timeframe).
It's very hard to ensure that the profile (and its family) is consistent with the source when we don't know what the source is; if we don't find the source, we should delete him (and the undocumented part of his family).
