Huck
Finn is a cute and enduring character, but I'm torn on the sound of Huck. Is it too much like a hacking sound? It is sort of how I feel about
Puck, which also has a fun folksy literary connection but sounds like something you'd throw.
Huckleberry in its entirety sounds silly, and, if I recall correctly, Huck
Finn wasn't fond of his full name either.
There is also the famous scene from Tombstone.