Tetraphobia

 has more on  Tetraphobia (from téssera, greek for "four") also known as Quadrophobia (from quattor latin for "four") is the fear of the. It is mainly suffered in several Asian countries like China, Vietnam, Korea, and Japan, as well as those ethnic groups in other parts of the world.

Trivia

 * The reason for this fear is that the word "four" rhymes with death in the native languages of people with this phobia.
 * As a result, people suffering from Tetraphobia may also have Thanatophobia, the fear of death.