Shah () is a Persian word which means the king or ruler of a country. This word is used in different countries in the world, including Iran, India, Pakistan and Afghanistan. Presently the term "Shah" is used as a surname commonly by many people in India, Pakistan and Afghanistan who are Hindu, Moslem and Jain. Many Indian names which have "Shah" in them; the most famous of them is Shah Jahan, who as the Emperor of India ordered the creation of Taj Mahal. One possible etymology of the chess term "checkmate" is the Persian "shah mat", meaning "the king cannot escape"