I have a "Särna" chair. "Sarna" in Spanish is "Scabies".
Fun fact: Although "Sarna" comes from Latin, seems like it's only used in Romance languages present in the Iberian Peninsula (Galician, Catalan, Portuguese, Spanish...) and not for example in Italian, Romanian or French, as it's an Iberian loan word. Most other languages derive from another different Latin word, "scabiēs".