Cognomen Merkus (Merkus 
) , in all the world, is quite a rare family name. The cognomen Merkus is habitual in Netherlands, where it is quite a rare surname, Israel, where it is a rare surname, and Australia. Measured by absolute frequency, it most frequently occurs in Netherlands, Ethiopia, and Canada. Very seldom, Merkus is the forename as well as the last name.
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| Merkus | Germany, Australia, Ethiopia, Netherlands, Canada |
| heinrich merkus NL (b. 1714) |
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pieter merkus Dutch officer and administrator, NL (b. 1787) |
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| jean gaspard merkus pastor from Amsterdam, owner/creator of the album amicorum of Jean Gaspard Merkus (b. 1758) |
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jeanne merkus Dutch guerilla fighter and activist, NL (b. 1839) |
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| petrus johannes fransiscus maria merkus (b. 1960) |
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| peter j f m merkus researcher |
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| paul merkus researcher |
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| daphne merkus researcher |
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| franciscus wilhelmus henricus maria merkus university teacher at Leiden University |
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| suzanne l merkus researcher (ORCID 0000-0003-0945-3738) |
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| maria petronella merkus 17 Nov 1741 Amsterdam - 31 Dec 1789 Paris (or Passy) |
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| charles guillaume merkus contributor to album amicorum of Petronella Moens |
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| w. merkus |
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| hendrikus merkus |
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| hans merkus |
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