Family name Martiniak (Martiniak 
) , worldwide, is a rare surname. The family name Martiniak is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Poland, where it is a very rare surname. In absolute terms, this name is the most popular in Slovakia, Brazil, and Czechia.
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