Srinivasa Ramanujan (1887 - 1920) was an Indian self-taught mathematician who, despite lack of formal education, discovered surprising results in number theory and analysis.
IPA:
['srinɪvɒsə rɒ'mɒnʊdʒən]
Minor note: "Srinivasa" may alternately be pronounced like ['ʃrinɪvɒsə]