Globally, Maillis (Maillis 
) is an extremely rare unknown gender forename. Much more prevalently, Maillis is the last name as well as the forename.
Mr, Bruno, Katie, Patou, Peter, Roger, David, Lance, Linda, James, Terry, Nancy, Elias, Eleni, Irene, Ilias, Onawa, Manoli, Sergio, Steven, Sylvia, Spiros, Cyril, Chris, Allan, Steve, Amy, Pat, Mary, Mike, Alex, Anna, Caio, Bill, Paul, Ruth, Angela, Rhea, Luiz, Jack, John, Troy, Eric, Inez, Olga, Maria, Marie, Susan, Luis, and Athina