And minecraft started as an Infiniminer clone intended to have Dwarf Fortress elements. Inspiration all the way down.

Merging two different ideas is almost by definition, not cloning.

Not at all. Aside from the aesthetic choice, both cube world and veloren have nothing in common with minecraft when it comes to gameplay.

Default gameplay maybe? But I'm pretty sure there were servers that tried to do whatever Veloren is doing. The diversity of minigames and whole game concepts on Minecraft servers was pretty extreme for a while.

And minecraft is an infiniminer clone which is a 3d clone of Motherload which is a clone of ...

It's Dig Dug all the way down...

Is Boulderdash a copy of Dig Dug?

Oh shoot, you right!

But Cube World wasn't a crafting or mining game; rather, it was an open-world Zelda-like ARPG, with a lot of progression from randomly-generated gear. The voxel size is smaller, and voxels are untextured, resulting in a 3D-ified pixel sprite look.

The term you might be looking for is voxel games.

Not really - look at the feature list.

You can make other voxel games. This game is not that, it's explicitly the list of features in Minecraft.