Across the world, Nielsine (Nielsine 
) is a very rare principally female, but very seldom masculine first name. The first name Nielsine is habitual in Northern Europe, particularly Denmark, where it is a rare feminine name. Very seldom, Nielsine is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Nielsine | United Kingdom, Mexico, Denmark, United States, Philippines |
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nielsine nielsen First female academic and physician in Denmark (1850-1916), DK (b. 1850) |
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nielsine petersen Danish sculptress, DK (b. 1851) |
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nielsine johanna kildahl American botanist, teacher and museum curator (1867-1967), US (b. 1867) |
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| nielsine wollesen Danish midwife, DK (b. 1844) |
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| nielsine paget Homemaker, community worker, NZ (b. 1858) |
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| nielsine margrethe johansen (b. 1878) |
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| nielsine larsen-ledet DK (b. 1884) |
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