[c-linkage]

He probably had plans to use it for some sort of Ender's Game crap but then realized that grok wasn't smart enough to do it.

[XargonEnder]

The word Grok comes from the novel Stranger in a Strange Land where the main character is Valentine.

[mcintyre1994]

More likely is that they took a bunch of good usernames to sell - if you pay for their most expensive subscription one of the features is that you can rent a better username now.

[ETH_start]

It's extremely unlikely Musk was personally involved in any way in the decision on the username.

[petesergeant]

In a normal business? Sure. When it comes to Musk and Twitter? Less sure.

[mghackerlady]

Add grok to that list, it's pretty much his pet project