This theory seems to be a favourite amongst etymologists.
If tools were put into this container, it became a toolkit, and if medicinal tools were put into it, it became a medical kit, but if money was put into a small container, it was just known as a kit, kitte or a kitty. Theory 1: Kitty referring to a “kit” containerĪround the 1300s, the Middle Dutch word “kit” (also spelled kyt, kitt, or kitte) referred to a wooden tub, barrel, pail, jug or tankard.
