Who invented the notation $Df$ for the derivative?

Question

We are often taught that $f'$ came from Newton and $\frac{df}{dx}$ came from Leibniz, but who introduced $Df$? Are there other notations for this simple idea by famous mathematicians?

Answer 1

According to Wikipedia, this is Euler's notation. You can find some more discussion of notations on the linked page. One other notation of particular note is $\dot x$ to mean the derivative of a quantity $x$ with respect to time. This is a reasonably common notation in physics, though is less often seen in pure mathematical contexts.

Answer 2

Newton came up with $\dot{y}(t)$ (fluxion), which is still used in physics. Lagrange with $f'$. According to this source $D$ was used (as operator) by Arbogast first.