It can be either, but mostly used as a girl's name.
Shay Roundtree's birth name is Shay Rountree.
Mildred Shay's birth name is Mildred Helen Shay.
Shay Carl's birth name is Shay Carl Butler.
His real name is Shay Butler.
Dorothy Shay's birth name is Dorothy Sims.
Victoria Shay's birth name is Allegra Hanson.
Shay Given's birth name is Seamus Given.
my name shayla and people call me shay or shayshay....and shanaynay ;D haha hope that helps
The name of Carly Shay's school in the show iCarly is Ridgeway
They never told Shay's last name in the books.
Carly Shay's Dad's name is Colnoel Steven Shay.
Shay Sweet's birth name is Kristy Lynn Castle.