English walnut, also known as Persian walnut or simply walnut, is a nut that comes from the Juglans regia tree. This tree is native to the regions of Central Asia and the Mediterranean, including Iran and parts of Europe. In addition to English walnut, the nut can also be called French or common walnut. In some countries, it is referred to as the Carpathian walnut or Madeira nut. Regardless of the name, English walnuts are a delicious and nutritious snack, often eaten on their own or incorporated into a variety of sweet and savory dishes.