More on Al Rakim from Infoplease:

• Al Rakim - Al Rakim (pronounce Rah-keem) The dog in the legend of the Seven Sleepers of Ephesus. Source: ...
• Ketmir - Ketmir or Katmir. The dog of the Seven Sleepers. Sometimes called Al Rakim. (Sale's Koran; ...
• The Koran/Sura XVIII — The Cave - In the Name of God, the Compassionate, the Merciful
• Dictionary of Phrase and Fable: A - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "A"