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Globally, Iwamasa (دايكى , Iwamasa ) is quite a rare mostly feminine, but infrequently male first name. The forename Iwamasa is characteristic of Western Asia, particularly Iraq, where it is quite a rare dominantly feminine, but uncommonly masculine name. More frequently, Iwamasa is the last name as well as the forename.
Ann, Akemi, Ayako, Coryn, Karli, Kazuo, Kaoru, Kevin, Kylan, Paula, Penny, Debra, David, Garey, Gayle, Grace, Glenn, James, Jason, Julia, Jimmy, Terry, Sofie, Shawn, Myrna, Owen, Amy, Kay, Ken, Ron, Roy, Mark, Mike, Shin, Alan, Cole, Wayne, Paul, Ruby, Dale, Dawn, Gary, Greg, Leah, Lynn, Jeff, Eric, Fumi, Rene, and Yukio