Cognomen Laczi (Laczi 
) , throughout the world, is quite a rare last name. The family name Laczi is habitual in Hungary, where it is quite a common surname, Romania, where it is a rare surname, and Austria. In absolute terms, it is commonest in Hungary, Romania, and Germany. Much less frequently, Laczi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Laczi | Germany, Romania, Philippines, Hungary, United States |
| laczi farkash Victim of the Holocaust, PL (b. 1925) |
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| krisztián laczi researcher ORCID ID = 0000-0002-9399-7406 |
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| miklós laczi researcher |
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| laczi katalin HU (b. 1975) |
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Mr, Janos, Nóra, Eddie, Erica, Helen, Zsolt, Ákos, Martin, Miklos, Lukas, Miguel, Mihail, Máté, Myrtle, Sharon, Sherry, Andrea, Andrew, Andras, Angela, Mihaly, Gergo, Gabor, Dóri, Ms, Don, Jã, Eva, Andi, Anna, Rita, Eric, Erin, Evan, Éva, Maris, Anita, Agota, Chris, Csaba, Balã, Peter, Priti, David, Diane, Anikó, and Aileen