All around the world, Kristiin (Kristiin 
) is an extremely rare dominantly feminine, but seldom masculine first name. Much less frequently, Kristiin is the last name as well as the forename.
Oja, Glancy, Jacobs, Harris, Wilcox, Carlson, Kartsep, Koosalu, Kesamaa, Keernik, Kirspuu, Duitsman, Jaanimets, Tambets, Holcomb, Uustalu, Castillo, Liezenga, Powers, Kulbas, Koppel, Burden, Mark, Mets, Sulg, Karu, Knut, Tolk, Hunt, Vraa, Heinonen, Sabey, Clark, Kirss, Känd, Pratt, Puuorg, Lewis, Zoova, Albert, Sikka, and Wahlberg