Family name Synnøve (Synnøve 
) , all over the world, is a very rare cognomen. The cognomen Synnøve is habitual in Northern Europe, particularly Norway, where it is a rare surname, and Sweden. Much more prevalently, Synnøve is the forename as well as the last name.
Berg, Åsebø, Solberg, Caspari, Bøgeberg, Bjørke, Karlsen, Røysland, Johnsen, Eriksen, Helland, Farstad, Svendsen, Andersen, Pedersen, Jacobsen, Johansen, Thoresen, Haugland, Pettersen, Halvorsen, Gabrielsen, Opedal, Folkvord, Fredly, Hjelle, Lien, Lund, Eide, Ulla, Myhre, Sunde, Lunde, Nesse, Olsen, Strand, Christensen, Skauge, Aamodt, Bakken, Bahnson, Larsen, Linløkken, Jensen, Nilsen, Ekroll, Hansen, Hammer, Svabø, and Kristiansen