I think the help console command looks for the ingame name and not the Editor ID. If you were to have a weapon with the Editor ID Weapon_Iron_Sword and ingame name Iron Sword, then you would type help "Iron Sword" in the console.
Alternative method: If you just want to be able to quickly travel to the cell for testing purposes, then you can look up the cell coordinates in CK and use the cow worldspacename x y console command (e.g. cow tamriel 5 5).
I thought it went by the editor name, since that's always what I seemed to get with 'help'.
Regardless, both the cell and in-game name share a common letter set, which is what I'm searching for.
Also, I
duplicated a different cell and renamed that one and it does show up in help. It is an interior.
This cell is an exterior and I did not create a new cell, but rather just renamed an existing, generic wilderness cell. Not sure which of those differences is giving me problems...