Why is Molly short for Mary?

Why is Molly short for Mary? Molly originated as a diminutive of Mary, spawning from medieval variations Malle and Molle. Molly has been used as a stand-alone pet form of Mary since the Middle Ages, and has been consistently popular as an independent name in the U.S. over the past several decades.

Molly originated as a diminutive of Mary, spawning from medieval variations Malle and Molle. Molly has been used as a stand-alone pet form of Mary since the Middle Ages, and has been consistently popular as an independent name in the U.S. over the past several decades.
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