dˈɑːnəld dʒˈɑːn lˈuːɪs twˈɛnti fˈaɪv dʒˈænjuːˌɛɹi nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɪks twˈɛnti fˈaɪv fˈɛbɹuːˌɛɹi tˈuː θˈaʊzənd fˈɪftiːn, bˈɛɾɚ nˈoʊn æz dˈiː.dʒˈeɪ. lˈuːɪs, wʌz ɐn ɐmˈɛɹɪkən mˌæθɪmɐtˈɪʃən spˈɛʃəlˌaɪzɪŋ ɪn nˈʌmbɚ θˈiəɹi.
Donald John Lewis (25 January 1926 – 25 February 2015), better known as D.J. Lewis, was an American mathematician specializing in number theory.