Where does the name reef come from?

Where does the name reef come from? North German: either a metonymic occupational name for a maker or seller of rope from Middle Low German reep ‘rope’ or a nickname for a feeble or very thin person from Middle Low German ref rif ‘body skeleton’. This surname is very rare in Germany.

North German: either a metonymic occupational name for a maker or seller of rope from Middle Low German reep ‘rope’ or a nickname for a feeble or very thin person from Middle Low German ref rif ‘body skeleton’. This surname is very rare in Germany.
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