What are the origins of the names and letters in these distributions:
What is the origin of the name in chi-square distribution $\chi_k^2$?
And the origin of $t$ in student's $t$-test?
And naming $Z$ and $\Phi$ in normal distribution?
The other classes of distributions have more understandable names, but I have definitely forgotten some unnatural. You are welcome to suggest more weird names.