With roughly a 12" blade, it could easily be a parrying dagger, especially with the longer quillons. Strictly speaking, the Spanish main gauche had hilts that covered the hand with a semi-basket guard. Not sure if the wooden grip is a replacement or ?. The grip does remind one of some of the Holbein styles of daggers of the same period. Loosely speaking, of course. I'm trying to remember where I've seen the grip style before. Not a Rondel, but perhaps a pattern along the same lines? Dagger experts out there?