Zech's logarithms - Why are they called "Zech"?

Question

Zech's logarithms are defined in here.

I couldn't find a reason why they are called "Zech". The only thing a dictionary suggests is that Zech is an abbreviation for Zechariah, which doesn't seem relevant, right?!

So, could you please shed light on this naming?

Answer 1

Apparently,

The reason for the name is that Julius Zech (1849) published a table of these logarithms (which he called 'addition logarithms') for doing arithmetic in $\mathbb{Z}$/p. These were, I think, intended for number-theoretical calculations.

From Oliver Pretzel - "Error-correcting codes and finite fields".

Edit: Gerhard Betsch up at "Math Forum" has written up a piece about his personal history and research. Among other things, he writes:

... Zech's tables were designed as a tool for calculations in theoretical astronomy. The preface makes no reference to Jacobi, and of course no reference to finite fields.