Hi Timo:
You have some interesting examples here and I would like to offer my two cents on a few of them.
No. 2 has a hilt very similar to the kakatua on a N. Borneo/Sabah barung that I posted some time ago. This may well be another example.
No. 6 has a scabbard that is definitely from Palawan. I have a similar scabbard on a nice bangkung (second half of 20th C), and if you search on this site for a "Palawan bangkung" I think you will find the name of the tribe that it came from. I don't recall who they are now.
No. 7 has a hilt similar to No. 2 and again I think this one is from N. Borneo/Sabah. Certainly the scabbard is atypical for Sulu Archipelago work. The Yakan, however, sometimes use similar geometric rattan wraps. But I would go with N. Borneo based on the kakatua.
No. 9 is an interesting arrangement with the hole through the blade and silver wire binding through the hole. I think this is likely to be Sulu Archipelago in origin. Zelbone has a bangkung with a hole in the same place and a wrapping that passes through it. Not a commonly found feature.
No. 10 has okir work on the blade that I again associate with N. Borneo/Sabah. I have a few barung decorated more crudely but in a similar manner that came from Kota Marudu in Sabah. There are pictures of these barung on this site.
No. 11 could be Yakan. Cato describes short ferrules as being a feature of some Yakan barung. The use of MOP on the scabbard is also common with Yakan work made for tourist consumption.
No. 13 again reminds me of N. Borneo/Sabah and the kakatua on this one is similar to the style of Sabah barung that I have shown previously here.
No. 14 is also likely to be N.Borneo/Sabah in origin based on the shape of the blade and a kakatua that are atypical of the Sulu Archipelago.
Just my personal views and I welcome the thoughts of others.
Ian.
P.S. Here is the link to N. Borneo/Sabah barung on the old web site:
http://www.vikingsword.com/ubb/Forum1/HTML/001304.html