Yvain,
I was totally ignorant of Guduf swords and their social context. You provided an interesting and informative analysis. A couple of our forum members have/had such swords and offer more details in this 2011 post.
http://www.vikingsword.com/vb/showthread.php?t=14062
No need to apologise for your English. It is my mother tongue, and I could not have done better.
Regards,
Ed