HI Rob T 
You might try this aproach. 
A Venenoza, correctly spelled A Venenosa, meaning The Poisonous ( Venomous ) One. Not a knife mark, but one of these popular phrases usually seen on blades. The z sounds the same as the s, and was used in an earlier period. The term is the same in spanish, but maybe the z letter apoints to old fashion Portuguese from Brazil or Brasil. 
Just a hint. 
fernando
		 
		
		
		
		
		
		
		
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