Three or third
Trai is a modern variation of the name Trey, which originated as a nickname for a third-born son or someone carrying the suffix III. It is derived from the Middle English and Old French word for the number three. While historically a nickname, it has evolved into a standalone given name in the United States.
Less common today
Trai isn't in the latest US Top 1000. It last peaked at #2,691 in 1993.
American actor known for the TV series Empire
NFL offensive guard
US births per 5-year period, 1990βpresent (SSA data).