In the entire world, Koyn (Koyn 
, Коин 
) is an extremely rare mostly female, but seldom boy's first name. More frequently, Koyn is the last name as well as the forename.
Kym, Tracey, Elijah, Vickie, Walter, Miranda, Michael, Charles, Rosalyn, Rebecca, Tamara, Russell, Laverne, Timothy, Michaele, Michelle, Kimberly, Randolph, Jonathan, Jennifer, Genavieve, Deborah, Jordan, Donald, Damion, Tim, Mary, Gary, Gail, Todd, Brian, Kevin, Peggy, Deann, David, Donna, Laura, Janet, Terry, Tc Rıza, Nancy, Helen, Mehmet, Steven, Kellye, Robert, Jacqueline, and Themistoklis