Sebastien
Sebastien is the French form of the masculine name Sebastian, which originates from the Latin name Sebastianus. The name is derived from the Greek word 'sebastos' meaning 'venerable' or 'revered'.
In the 3rd century AD, there was a popular Christian martyr named Saint Sebastian who was killed for his faith during the Roman persecutions. The name grew in popularity in the Christian world due to devotion to this martyr.
In France, the spelling Sebastien became favored over the Latin Sebastian. It has been a consistently used name for boys in French-speaking regions for centuries due to its meaning, historical background, and association with the martyr.
While the French form Sebastien is certainly more common in France and French-speaking areas, both spellings are used internationally today. The name maintains an air of strength and dignity from its venerable meaning and origins.