I just took the opportunity of your post to write about my little research about those words, that's all.
Btw, isn't that word
qen in Albanian? I didn't research about
kan, but the sources say "dog" in Albanian is
qen. Is it a dialectal variation? All I could found was that
qen would come from Latin
canis via Proto-Albanian
*kjen (reconstructed), but I don't know precisely why they assume that, but I think that's because of the sound rules that were applied to Albanian from PIE to the early stages of Albanian, namely: the PIE root
*k'wó- has a palatalized /k/, which accoridng to the sound correspondences found in many other Albanian words should have become a /th/, not a /k/. But if the original root had become a fully labialized /kw/ eventually delabialized, then I can see it theoretically becoming a
q, therefore
qen. I think both possibilities are plausible. In any case, it's a well known IE root found in many branches, so I think it's really a bit surprising if it didn't survive in Illyrian.