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Family name Niisi (Niels
, Niisi) , across the world, is quite a rare last name. The family name Niisi is habitual in Liechtenstein, where it is quite a rare surname, Cyprus, and Denmark. Measured by absolute frequency, it is the most numerous in Belgium, Netherlands, and Denmark. Predominantly, Niisi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Niels | Netherlands, Belgium, United States, Denmark, Germany |