Last name Mercator (Mercator 
) , across the world, is a very rare cognomen. The family name Mercator is habitual in Belgium, where it is a rare surname, Germany, where it is a very rare surname, and Spain. More frequently, Mercator is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mercator | Belgium, Spain, Italy, Germany, United States |
| marius mercator Christian writer (b. 390) |
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gerhardus mercator Dutch cartographer, philosopher and mathematician (1512–1594), BE (b. 1512) |
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| michael mercator (b. 1491) |
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| arnold mercator German cartographer, BE (b. 1537) |
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| bartholomäus mercator cartographer, BE (b. 1540) |
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| rumold mercator Flemish cartographer, DE (b. 1545) |
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nikolaus mercator German mathematician (c.1620 – 1687), DE (b. 1620) |
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| gerhard mercator (b. 1565) |
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mercator cooper American whaler, US (b. 1803) |
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michael mercator |
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| gerard mercator 1642-1648; Alternative names: Gisbertus secundus |
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| arnold mercator German merchant |
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| isidorus mercator |
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| martin mercator |
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| michael mercator |
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