<Tr> <Td> Greece </Td> <Td> 4,500 </Td> <Td> </Td> <Td> Romaniotes, Sephardi Jews </Td> <Td> Greece </Td> <Td> South - East European </Td> </Tr> <Tr> <Td> Hungary </Td> <Td> 48,600 </Td> <Td> 100,000 </Td> <Td> Oberlander Jews, Satmar Hasidic dynasty, and Neolog </Td> <Td> Hungary and Carpathian Ruthenia </Td> <Td> Hungarian </Td> </Tr> <Tr> <Td> Iceland </Td> <Td> 10 - 30 </Td> <Td> </Td> <Td> Radhanites </Td> <Td> Iceland </Td> <Td> North European </Td> </Tr> <Tr> <Td> Ireland </Td> <Td> 1,900 </Td> <Td> </Td> <Td> Ireland </Td> <Td> West European </Td> </Tr>

Judaism spread in the ancient world primarily by