Are there Rules of Tragedeigh Names?

As far as I can tell, the following things make a name a tragedeigh:

1. Replacing “e” or “a” or sometimes “I” with “eigh” is almost always a tragedeigh Ex: Kaitlin becomes Keightlin

2. Changing the spelling of a real name to add K, X, Y, or sometimes Z (the “unique” letters) Ex: Jackson becomes Jaxxsyn

3. Unnecessary apostrophes Ex: Devon becomes De’von or (shudder) D’e’von

Combinations of these three rules gets us awful garbage like J’eighsyn.

What rules am I missing?