Worldwide, Martiniak (Martiniak 
) is an extremely rare unknown gender first name. Much more prevalently, Martiniak is the last name as well as the forename.
Mr, Chris, Brian, Paulo, Pavol, Peter, Pedro, David, Diana, Diogo, Laura, Leoni, Leroy, Lidia, Lucia, Janet, Jaine, Joyce, Jozef, Julia, Julio, Thais, Sofia, Tiago, Sarah, Vera, Ms, Ana, Don, Jan, Tim, Zoe, Mary, Mark, Maik, Mike, Alan, Aysa, Cole, Rosa, Gary, Lais, Luiz, Jake, Jose, Joao, Joel, Maria, and Neiva