How did the frog of the violin bow get its name?

Question:

How did the frog of the violin bow get its name?

Additional Details

6 months ago
Older names for the frog were easily understandable (Heel, nut). But how did the the term "frog" come to be?

6 months ago
How did it end up that the bottom part of the bow nearest to the hand came to be called the frog?

6 months ago
The frog is the bottom of the bow that is nearest to the hand.

Best Answer - Chosen by Asker: 6 months ago
Older names for the frog were easily understandable (Heel, nut). But how did the the term "frog" come to be?