manual: Why use 'maude' as the example program name?

[Kang-Che Sung]

In Automake manual, I see several places where it uses "maude" or "mumble"
as
 example name of program, even in the Indices section. And I really wonder
one
thing: Why these obscure name had been chosen, instead of having a name like
"myprog", "foo" or "fooprog" that is more obvious as a placeholder?

This had troubled me when I need to look up the meanings of Automake
variables
frequently in order to write a debug an Automake file. And I hope the
keywords can be indexed in a better way.