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All over the world, Siera (Siera , เซียร่า) is quite a rare mostly female, but uncommonly masculine forename. The given name Siera is characteristic of Indonesia, where it is a rare mostly feminine, but uncommonly male name, the United States, where it is a rare principally feminine, but very infrequently masculine name, and Philippines, where it is a very rare principally feminine, but very seldom boy's name. Not in comparison with a country's population, the name is most common in the United States, Indonesia, and India. Also, Siera is the last name as well as the forename.