Bith may refer to:
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Bith (Celtic mythology)
Cessair or Cesair (spelled Ceasair in modern Irish, meaning sorrow, affliction) is a character from the ''Lebor Gabála Érenn'', a medieval Christian pseudohistory of Ireland. According to the ''Lebor Gabála'', Cessair was the leader of the firs ...
, a character from Goidelic Celtic mythology
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Bith (''Star Wars''), an alien race in ''Star Wars''
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