Last name Caballer (Caballer 
) , all over the world, is quite a rare family name. The last name Caballer is habitual in Eswatini, where it is quite a rare surname, Puerto Rico, and Spain. Measured by absolute frequency, it is the most numerous in Spain, Bolivia, and Puerto Rico. Also, Caballer is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Caballer | Puerto Rico, Bolivia, United States, Eswatini, Spain |
| josep hospitaler i caballer Spanish writer, ES (b. 1820) |
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| josé caballer caballer Spanish science fiction writer, ES (b. 1925) |
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| maría francisca caballer Spanish singer (1927-1999), ES (b. 1927) |
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| francisco caballer Spanish field hockey player, ES (b. 1932) |
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| joan antoni verge caballer (b. 1960) |
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| caballer a researcher |
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| miguel caballer researcher ORCID ID = 0000-0001-9393-3077 |
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| gemma caballer (b. 1974) |
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