dagger for ID... made from a broken sword ?

[asomotif]

Good day fellow collectors.

Once more I am lost from the ethnographic forum.

Somebody asked me to ID this dagger.
I can make all kinds of educated guesses, but I am sure there will be much more info to get from the experts
Questions / remarks, fire away..

Ps. I think this is a shortened sword, based on the thikness of the blade near the ricasso. (see the last picture)

Best regards,
Willem