Bayt al-Maqdis or Bayt al-Muqaddas is a less commonly used Arabic name for Jerusalem though it appeared more commonly in early Islamic sources. It is the base from which nisbas (names based on the origin of the person named) are formed – hence the famous medieval geographer called both al-Maqdisi and al-Muqaddasi ( 946) This name is of a semantic extension from the Hadiths used in reference to the Temple in Jerusalem, called "Beit HaMikdash" (בית המקדש "The Holy Temple" or "Temple of the Sanctified Place") in Hebrew.