I suspect that every pronounceable combination of four Latin letters, and a number of unpronounceable ones, has been used as a moniker in the past, often multiple times.

Given that each person on earth could give themselves and 6 other things globally unique names using only 8 letters from the English alphabet, without replacement to make the names more unique[1], it's kinda sad that we have all these naming collisions.

[1]: https://www.calculator.net/permutation-and-combination-calcu...