The name Khoi is of Vietnamese origin and means 'happiness'. It is composed of two characters, ' Khò' meaning 'towards', and 'nhi' meaning 'second'. Together, they form a word that signifies movement towards happiness.
The name Khoi has seen a significant increase in popularity over the years, with a notable spike starting from around the mid-1990s. The peak of its popularity seems to have been reached in recent years, with birth numbers consistently high since 2015. However, there was a dip in 2021 and 2022, with numbers returning to higher levels in 2023.