Hi again,
There's a Viking "Ragnarr Loðbrók". You probably mean him?
Loðbrók is a byname and means "loden breeches, woollen trousers"
Concerning Wafenia (Waveney) I've found this site:
http://www.ling.ed.ac.uk/linguist/issues/12/12-3151.html
saying:
...the river Waveney, whose name elements *wagen 'quagmire' and ea 'river'...
I cannot see a connection between the river and the Viking though...
Regards,
Satu