Fir·dau·si 
(fîr-dousē) also Fir·du·si (fər-dsē) or Fer·dow·si (fĕr-dousē) Pen name of Abu-l-Qasim Mansur. 940?-1020?
(fîr-dousē) also Fir·du·si (fər-dsē) or Fer·dow·si (fĕr-dousē) Pen name of Abu-l-Qasim Mansur. 940?-1020? Persian epic poet whose Book of Kings (1010) recounts the history of Persia from the arrival of the Persians to the Arab conquest.