Globally, Cayou (Cayou 
) is an extremely rare unknown gender forename. Much more prevalently, Cayou is the last name as well as the forename.
Bob, Fred, Sarah, Scott, Alvin, Anita, Ariel, Cheri, Clint, Cindy, Billy, Karen, Pammy, Debra, David, Diego, Lauri, Leona, Louis, Janel, Jacob, James, Edna, Jamal, Nick, Jill, Ron, Dan, Ina, Ian, Mary, Mark, Mylo, Shad, Anna, Ayla, Chad, Cree, Kris, Rena, Rita, Dean, Gail, Lexi, Lori, John, Joel, Troy, and Jonny