
Kohen or cohen (or kohain; כֹּהֵן, `priest`, pl. {Hebrew|כֹּהֲנִים} kohanim) is the Hebrew word for priest. Jewish kohanim are traditionally believed and halakhically required to be of direct patrilineal descent from the biblical Aaron. During the existence of the Temple in Jerusalem, kohanim performed the daily and holiday (Yom T.....
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http://en.wikipedia.org/wiki/Kohen

a priest
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http://www.encyclo.co.uk/local/21584
(kohan, cohen) a descendant of Aaron, a priest charged with performing various rites in the Temple in connection with religious rituals and animal sacrifices. (Recent DNA research found that Jews in three different countries identified as kohens have common elements in the y chromosome, indicating that they have a common male ancestor.)
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https://www.familysearch.org/wiki/en/Jewish_Glossary
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