Cognomen Helmont (Helmont 
) , all over the world, is a very rare surname. The last name Helmont is habitual in Netherlands, where it is a rare surname, Belgium, and Nicaragua, where it is a very rare surname. More prevalently, Helmont is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Helmont | Belgium, Nicaragua, Democratic Republic of the Congo, Honduras, Netherlands |
Van Helmont, and Ван
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johan baptista van helmont chemist, physiologist, and physician from the Spanish Low Countries, BE (b. 1577) |
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franciscus mercurius van helmont Flemish alchemist and writer, BE (b. 1614) |
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mattheus van helmont Flemish painter (1623-1679), BE (b. 1623) |
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| jan van helmont Flemish painter (1650-1714), BE (b. 1650) |
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| joan kies helmont NL (b. 1700) |
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| johann franz van helmont BE (b. 1701) |
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| charles-joseph van helmont Belgian composer (1715-1790), BE (b. 1715) |
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| adrien-joseph van helmont (1747-1830) (b. 1747) |
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| johannes von helmont Roman Catholic prelate, DE |
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| geertruida van helmont in Bergen-op-Zoom - 15 Oct 1602 Doesburg |
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| sybilla anna van helmont Est 1722 - 11 Jul 1792 Princenhage |
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| theodor helmont Noord-Nederlands; schilder; Noord-Nederlands; schilder |
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| petrus van helmont BE |
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| jacques van helmont |
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| adriaan joseph van helmont |
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