Rex is a distinctive boys' name in United States, ranking #905 in 1997 with 152 recorded births. The name reached its all-time peak in 2017 with 434 births ranking #607. In 1997, approximately 1 in every 12,402 boys born was named Rex. FALLING Recent data shows the name is currently falling.
Rex is a brisk, bold Latin name meaning king. Its strength comes from being so short and direct.
The word itself is ancient, but its use as a given name belongs more to the modern taste for compact, forceful names. It has remained recognisable through its unmistakable meaning.