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Name days
Name: Jacek
| Country | Month | Day | Name days |  Poland | February | 10 | Elwira, Gabriel, Jacek, Jacenty, Scholastyka, Tomisława | | Poland | July | 3 | Anatol, Jacek, Korneli, Leon, Miłosław, Otto | | Poland | August | 17 | Anastazja, Angelika, Anita, Bertram, Eliza, Jacek, Jaczewoj, Joanna, Julianna, Liberat, Miron, Żanna, Zawisza | | Poland | September | 11 | Feliks, Jacek, Jan, Naczesław, Prot |
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