Nice knives,they are definately related to mine but I cant help but think that we are dealing with :
A.One type of knife that has numerous variants.
B.Several knives that are similar and from the same region but are actually diffent knives.{I favor B}
Just a note on the tip of fullered Turkish dagger,the last 1/5in of the tip is NOT sharpened which I presumed was to help strengthen the tip for said thrusting purposes.
The last knife posted reminds me more of these guys:
http://www.vikingsword.com/ubb/Forum1/HTML/002096.html
http://www.vikingsword.com/ubb/Forum1/HTML/002492.html