In the entire world, Tahtinen (Tahtinen 
) is an extremely rare unknown gender first name. Much more prevalently, Tahtinen is the last name as well as the forename.
Mr, Dean, Dale, Dawn, Gary, Greg, Gina, Lana, Lisa, Lucy, Jana, Jack, Jesi, Jeff, Todd, Troy, Elle, Eric, Evie, Marko, Megan, Mikko, Ryan, Rudy, Ruth, Rick, Ms, Sue, Ara, Kht, Pia, Roy, Dan, Tim, Htm, Mary, Sarah, Mark, Mike, Miia, Satu, Sean, Anne, Cody, Kati, Kali, Paul, Rana, Maja, and Sammi