Hello Jo,
Yes, you are correct, the middle one is a Luzon dagger, a very nice one!
The one on the left isn't a dagger, it's a knife from Bali, I would say that it's belongs to the tiuk pengentas family, see here:
http://www.vikingsword.com/vb/showth...=tiuk+pegentas
I've attached a similar knife from my own collection.
Can't say something about the third knife.
Regards,
Detlef