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Leib Yaffe (Hebrew: אריה לייב יפה ) was a Hebrew poet, journalist and editor of Haaretz newspaper.
Leib Yaffe was born in Grodno, Belarus. A life-long champion of the Zionist cause, he immigrated to Palestine, where he became chief editor of Haaretz. He served as director-general of Keren Hayesod until March 11, 1948, when he and 12 others were killed by a car bomb in the courtyard of the Jewish Agency building in Jerusalem.
A street is named after him in Jerusalem's Talpiot neighborhood, as well as in Herzliya, Israel.