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Worldwide, Kostelecky (Kostelecky
, Kostelecký
, Костелецький
) is an extremely rare boy's forename. Much more frequently, Kostelecky is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kostelecky | Canada, Czechia, Austria, United States, Germany |
| Kostelecký | Czechia |
| Костелецький | Ukraine |