In the entire world, Völcker (Völcker 
) is an extremely rare unknown gender first name. Much more prevalently, Völcker is the last name as well as the forename.
Tim, Heinz, Heike, Frank, Martin, Markus, Miriam, Stefan, Cedric, Björn, Katrin, Regina, Gudrun, Gisela, Thomas, Henrik, Manuela, Manfred, Mathias, Michael, Michell, Susanne, Henri, Ernst, Edith, Jonas, Ina, Uwe, Karl, Paul, Dirk, Jens, Till, Eric, Ingo, Olaf, Andreas, Otto, Magda, Silja, Allan, Chris, Claes, Claas, Bernd, Karla, Klaus, Peter, Maria, and Annette