In the entire world, Mary-Louise (Mary-Louise 
) is a rare girly first name. The first name Mary-Louise is habitual in Australia, where it is a rare feminine name, Ireland, and the United Kingdom, where it is a very rare predominantly girly, but very seldom masculine name. In absolute terms, it most frequently occurs in the United States, Australia, and the United Kingdom. Parts of the name also exists independently as a first name Mary, and a first name Louise.
| VARIANT | COUNTRY |
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| Mary-Louise | United Kingdom, Australia, Ireland, United States, France |
| mary-louise marten (1952-2012) (b. 1952) |
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| mary-louise anne hamill-stewart (born 1959) (b. 1959) |
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| mary-louise de rohan (born 1967) (b. 1967) |
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| mary-louise wilde researcher |
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| mary-louise penrith South African epidemiologist and ichthyologist, ZA |
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| mary-louise c greer researcher |
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Ba, Madison, Mabulay, Melrose, Shulman, Sweeney, Angoujard, Collins, Crosbie, Rahaley, Roberts, Lambert, Jackson, Johnson, Wastell, Marshall, Schroder, Chandler, O'Connor, Williams, Duckworth, Hengesbaugh, Hooper, Hansen, Lovell, Dompke, Mari, Shea, Kirk, King, Pope, Pick, Gray, Long, Scott, Smith, Scappaticci, Abney, Burch, Wiley, White, Quinn, Martin, Condon, Conway, Colace, Coates, Rogers, Brown, and Hildebrandt