Shay is a distinctive girls' name in England & Wales, ranking #1296 in 1996 with 14 recorded births. The name reached its all-time peak in 2017 with 24 births ranking #1371. In 1996, approximately 1 in every 21,143 girls born was named Shay. FALLING Recent data shows the name is currently falling.
Shay is a genuine multi-origin name. Behind the Name lists it both as an anglicised Irish form of Séaghdha and as an alternate transcription of the Hebrew name Shai.
Because both routes are established, the safest published treatment is to present Shay as multi-origin rather than force one meaning. In Irish use it follows an older Gaelic name, while in Hebrew use it belongs to a separate established line.