Hi Fernando,
First instinct would make me say Hunting knife. The figures certainly suggest to me a dog with the other being quarry with swept back horns/antlers, Ibex? or might be stylized deer. Ibex hunting still popular on the Iberian peninsula and the dagger style again in keeping with Southern Europe. Doesn't look like a fighting knife more a rich mans hunting dagger. Nice piece
My Regards,
Norman.