Around the globe, Østerby (Østerby 
) is an extremely rare unknown gender forename. Much more prevalently, Østerby is the last name as well as the forename.
Kim, Mette, Simon, Sofie, Steen, Stine, Claus, Karin, Katja, Peter, Peder, Rikke, Ditte, Doris, Gitte, Jakob, Jonas, Jette, Jeppe, Teddy, Trine, Nanna, Marie, Åse, Ulla, Inge, Per, Pia, Jan, Tom, Fie, Ida, Ove, Ute, Mads, Maja, Niels, Mona, Anne, Anja, Arne, Carl, Ruth, Lars, Lene, John, Jens, Erik, Anna, and Ellen