Probably because he was such a famous character at the time when his death featured in one of Agatha Christie's novels. Poirot appeared in 33 novels and 51 short stories many of which have been made into movies and television series.
Hercule Poirot was a character created by Agatha Christie - a Belgian detective
Her most famous Belgian detective would be Hercule Poirot. He featured in many books, the first of which was 'The Mysterious Affair At Styles', written in 1921. Agatha Christie also wrote about other detectives, such as: Miss Marple and Tommy and Tuppence.
The character of Hercule Poirot was written by Agatha Christie to be of Belgian nationality.
Hercule Poirot is a Belgian detective created by Agatha Christie.
Agatha Christie had two middle names - she was born Agatha Mary Clarissa Miller (Christie was her first married name).
Agatha Christie
Hercule Poirot's eye color is described as green in Agatha Christie's novels.
Hercule Poirot's middle name is not officially disclosed in Agatha Christie's novels.
Agatha Christie's Poirot - 1989 Hercule Poirot's Christmas 6-1 is rated/received certificates of: Australia:PG UK:PG (video rating) (2000)
The stories of Hercule Poirot were written by Agatha Christie, a renowned British author known for her detective fiction novels. Poirot first appeared in Christie's novel "The Mysterious Affair at Styles" and went on to feature in many of her works.
There is no book called "Hercule Poirot". Agatha Christie wrote thirty-four novels and sundry stories featuring Poirot, but none of them has that name.
If you meant Hercules Poirot - it was Agatha Christie.