Complex sentence: Many believe that the name "Kiruna" comes from the Sami language "Giron" and means ptarmigan, the truth is that it comes from the finnish language "kiiruna" the meaning is the same, a white bird native to northern areas.
Split into simpler sentences: Many believe that the name "Kiruna" comes from the Sami language "Giron" and means ptarmigan. In reality, it comes from the Finnish language "kiiruna" and refers essentially to the same: a white bird native to northern areas.