Hekiganroku - Case 68: Kyozan and "Your Name"

Kyozan asked Sansho,
  "What's your name?"
Sansho said,
  "Ejaku. [1]"
Kyozan said,
  "Ejaku -- that's me."
Sansho said,
  "My name is Enen. [2]" 
Kyozan laughed loudly.

[1] The complete name of Kyozan is "Kyozan Ejaku".
[2] The complete name of Sansho is Sansho Enen.