Jean Marie Dayot

Jean Baptiste Marie Dayot was a French Navy officer and an adventurer who went into the service of Nguyn nh, the future emperor Gia Long of Vietnam.

Originally from a Britany family settled in Ile Bourbon, JeanMarie Dayot was born in Port Louis, Ile Maurice. He became a Lieutenant de vaisseau auxiliaire in the French Royal Navy. He met with Pigneau de Bhaine either in the Ile Bourbon or Pondicherry, and is thought to have commanded one of the two commercial ships which accompanied the warship Mduse with Pigneau de Behaine to Vietnam.

Source: Wikipedia