In the entire world, Haeuser (Haeuser 
) is an extremely rare unknown gender first name. Much more prevalently, Haeuser is the last name as well as the forename.
Mr, Gary, Gail, Glen, Lesa, Lisa, Lori, Lois, John, Jens, Tony, Nina, Edie, Eric, Erik, Emma, Hans, Ford, Ines, Will, Mandy, Sarah, Dale, Susan, Dean, Ruth, Ms, Le, Mae, Ari, Amy, Bob, Kim, Pat, Rob, Lee, Tom, Tim, Mary, Mark, Skip, Anne, Axel, Chas, Bill, Karl, Rose, Ryan, and Sonya