Worldwide, Cusak (Cusak 
) is an extremely rare feminine first name. Much more frequently, Cusak is the last name as well as the forename.
Mr, Sandra, Sharon, Adonis, Austin, Brodie, Jelena, Taylor, Matthew, Maureen, Michael, Shannon, Stanley, Charles, Clayton, Brandon, Bärbel, Patrick, Phillip, Taralee, Margaret, Jonathan, Martha, Wayne, James, Jacob, Tom, Mary, Mike, Sean, Stan, Alen, Cara, Paul, Glen, John, Jennifer, Jone, Nora, Ivan, Susan, Karla, Peter, Ralph, Dario, David, Garry, Janet, Tony, and Bernadette