In all the world, Rosslyn (Rosslyn 
) is quite a rare predominantly feminine, but very seldom masculine first name. The forename Rosslyn is habitual in Australia, where it is quite a rare girly name, the United Kingdom, where it is a rare predominantly girly, but scarcely boy's name, and South Africa. Measured by absolute frequency, it is the most numerous in Australia, the United States, and the United Kingdom. Much less frequently, Rosslyn is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Rosslyn | Kenya, United Kingdom, United States, South Africa, Australia |
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rosslyn bruce English Anglican priest, naturalist and writer, GB (b. 1871) |
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| rosslyn webb odell (1879-1942) (b. 1879) |
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rosslyn noonan New Zealand politician, trade unionist and human rights commissioner, NZ (b. 1946) |
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| rosslyn hunter rankin-reid Peerage person ID=473665 (b. 1910) |
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| rosslyn range American long jumper, US (b. 1933) |
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| rosslyn violet st. clair (born 1947) (b. 1947) |
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| rosslyn lucas kirkby peace (born 1968) (b. 1968) |
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| rosslyn grace minchin Peerage person ID=339103 |
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| rosslyn fairfax huxley cowen Peerage person ID=641490 |
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| rosslyn shipp museum director, Cumberland, B.C. |
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| unknown sinclair of rosslyn Peerage person ID=491787 |
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| sir william sinclair of rosslyn Peerage person ID=684815 |
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| rosslyn de wet researcher (ORCID 0000-0002-7950-4759) |
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| rosslyn faulkner |
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Ray, Ruffin, Davies, Duncan, Taylor, Turner, Howard, Hudson, Cornish, Bentley, Kennedy, Richard, Diamond, Jackson, Johnson, Elliott, Edwards, Halekakis, Anderson, Robinson, Richards, Thompson, Parker, Mccrae, Murphy, Miller, Hay, Saha, Cole, King, Tong, Hill, Ford, Wood, Scott, Smith, Williams, Allen, Brown, Davis, Green, Laing, Lewis, Lopez, Jones, Evans, White, Young, Beard, and Forrester