which year was he born?
1901 or 1903
Jean-Joseph Rabearivelo
Jean-Joseph Rabearivelo (4 March 1901 or 1903 – 22 June 1937), born Joseph-Casimir Rabearivelo, is widely considered to be Africa's first modern poet and the greatest literary artist of Madagascar. 
who is jean-joseph rabearivelo? First modern poet and the greatest literary artist of Madagascar
wiki:4980489
Jean-Joseph Rabearivelo [SEP] Introduction
Following Rabearivelo's suicide by cyanide poisoning in 1937, he became viewed as a colonial martyr. The death of Rabearivelo occurred just prior to the emergence of the "Négritude" movement, by which time the Malagasy poet had established an international reputation among literary figures such as Léopold Sédar Senghor as Africa's first modern poet. The Government of Madagascar declared Rabearivelo its national poet upon independence in 1960. The legacy and influence of his works continue to be felt and his works are a focus of ongoing academic study. Modern Malagasy poets and literary figures including Elie Rajaonarison have cited him as a major inspiration.