Cognomen Iaab (Iaab 
) , across the world, is an extremely rare surname. Much more prevalently, Iaab is the forename as well as the last name.
Wa, Martin, Monika, Samuel, Sylvia, Alfred, Andrea, Conrad, Roland, Rudolf, Fritz, Walter, Andreas, Claudia, Barbara, Roberto, Matthias, Cornelia, Beatrice, Christian, Christine, Werner, Ernst, There, Josef, Un, Mar, Urs, Ulf, Mart, Chri, Beat, Kath, Ruth, Erna, Emma, Ians, Otto, Monik, Susan, Adine, Bruno, Bryan, Peter, Doris, Lydia, Catherine, and Jean-Louis