In reply to Quentin Blake book font: Drawing for the Artistically Undiscovered:
Well, that's how Filmotype named their fonts way back when.
A few years ago, when the group of us* were planning on how to digitize the Filmotype library, we debated the question of this quirky naming scheme. In the end, we decided it was important to us to preserve the historical names as much as possible. They don't all fit neatly into type families anyway.
* I'm a former member.