The name reached its all-time peak in 2018 with 29 births ranking #985. FALLING Recent data shows the name is currently falling.
Cash is a sharp modern name chosen more for sound and image than for a traditional inherited meaning. It belongs to the group of bold one-syllable names that feel brisk, current, and distinctly American.
The name's modern visibility owes a lot to surname use and cultural associations, especially with Johnny Cash. As a first name, it is very much a style-led modern choice.