Bhigbout Aen was a deceased Acamarian. An autopsy performed on their body revealed the cause of death to be cerebral hemorrhage. This hemorrhage was attributed to a sudden onset of tissue inflammation following a spinal injury.
In 2366, this individual was mentioned in the death records archives, which were accessible to the crew of the USS Enterprise-D via the Acamarian planetary database (TNG: "The Vengeance Factor", okudagram)
This character was only mentioned in writing.
Bhigbout Aen seems to be named after John Bigbooté, a character from The Adventures of Buckaroo Banzai Across the 8th Dimension. It was one of several in-joke references to the movie in the records.