Below are the names that I have seen for these blades. Do note that the ones with a Astrix indicates that this could be a fan named blade and not something actually seen in script or mentioned on screen.
1. UnKnown (I have wondered about this one as it was on Worf's display plaque in his quarters)
2.
quv'etlh (name mentioned in the Klingon interactive CD ROM game) This is actually styled off a crescent knife used in martial arts (I recall seeing them ninja magazines in the 80's).
3. Assassins dagger (been used for many aliens). Also seen as a Jem'hadar "Double Knife” from the DS9 episode “TO THE DEATH”.
4. Mekleth
5. tajtIq (Worf and Gowron fought to the death with them in the DS9 Episode "Apocalypse Rising")
6.
d'k tahg
7.
bet'leH
8.
d'k tahg (again)
9. *Some people call this a 'aqleH (Half bat'leth), but it's actually a Jem'hadar axe.
10. Not really a Klingon knife, but may have been used as one. It's been featured in various episodes of Star Trek: The Next Generation like “Tapestry” for use by aliens like the Nausicaans.
11. Unknown name *Usually refereed to by fans as "the pizza cutter". This blade sold with a more rougher designed knife similar to #1 at
Cristie's for $2400. NOTE: This knife is a simplified version of a
Tibetan knife called the
Kartika.
If anyone else has any further info, please post them.