Jacob Klein (Assyriologist) (born 1934), Professor Emeritus of Assyriology and the Bible at Bar-Ilan University and a member of Israel Academy of Sciences and Humanities
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Jacob Theodor Klein (1685–1759), Royal Prussian jurist, historian, botanist, mathematician and diplomat
Calvin Klein | Jacob | John Jacob Astor | Jacob M. Appel | Jacob Epstein | Jacob Zuma | Jacob Obrecht | Yves Klein | Naomi Klein | Melanie Klein | Jacob Lawrence | Jacob Appel | John Jacob Astor IV | Joe Klein | Irène Jacob | Ralph Klein | Jacob Jordaens | Felix Klein | Paul Jacob | Calvin Klein (fashion designer) | Meshullam ben Jacob | Jacob Riis | Jacob Grimm | Jacob Christian Schäffer | Jacob Appelbaum | Anne Klein | Allen Klein | Lawrence Klein | Joel Klein | Jacob Truedson Demitz |