Grethel may refer to:
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Grethel, Kentucky, an unincorporated community located in Floyd County
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Henry Grethel
Henry E. Grethel (born November 20, 1931) is an American fashion designer, merchandiser and marketer. He was born in Syracuse, New York, and is known for his American sportswear collections which make use of sophisticated colors and fine fabrics. ...
, an American fashion designer
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