Surname Izsák (Izsak 
, Izsák ) , worldwide, is quite a rare cognomen. The cognomen Izsák is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Romania. Very seldom, Izsák is the forename as well as the last name.
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| Izsak | Canada, Romania, Slovakia, United States, Hungary |
| Izsák | Romania, Slovakia, Hungary |
Iiro, Iisakki, Ike, Isaac, Isaacus, Isaak, Isac, Isacco, Isak, Ishak, Issaak, Itshak, Itzhak, Izaac, Izaak, Izak, Jicchak, Yitshak, Yitzhak, Айзек, Айк, Изаак, Ике, Исаак, Исаак, Айзек, Исаако, Исак, Исако, Исхак, Ицхак, Ицхок, Ісаак, Ісак, Іцхак, אייזיק, יצחק, أوتو, إسحاق, إسحق, اسحاق, ايزاك, ইসহাক, アイク, イケ, and イサク
| izsák ben báruk albália (b. 1035) |
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| fegyverneki izsák Hungarian theologian, HU (b. 1550) |
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| izsák schulhof (b. 1650) |
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| babócsay izsák Hungarian clerk, HU (b. 1695) |
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lőwy izsák Hungarian businessman, HU (b. 1793) |
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| taub izsák HU (b. 1751) |
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| izsák ehrenreich (1765–?) (b. 1765) |
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| izsák billitzer (1801–1887) (b. 1801) |
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perlmutter izsák Hungarian painter, HU (b. 1866) |
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izsák károly Hungarian association football player (1890-1945), HU (b. 1890) |
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| glück izsák HU (b. 1835) |
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izsák márton Hungarian-Romanian sculptor, RO (b. 1913) |
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józsef izsák literary historian (1921-2004), RO (b. 1921) |
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| weiss izsák HU (b. 1874) |
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| pfeiffer izsák Hungarian rabbi, poet (1884-1945), HU (b. 1884) |
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Imi, Gábor, János, Júlia, Tamás, Eszter, Viktor, Ferenc, Zsuzsa, Mariann, Melinda, Márton, Mónika, Sándor, Szilárd, András, Bálint, Károly, Pulugor, Renáta, Róbert, Dominik, Dávid, Attila, Andrea, Mária, Anna, Erik, Hát, Imre, Éva, Marta, Csaba, Kitti, Réka, David, Dániel, Dalma, Gróf, Lajos, Lilla, Judit, Nóri, Erika, Varga, Imola, Zsolt, Ákos, Dóra, and Gergely