Surname Ronaldson (Ronaldson 
) , globally, is quite a rare cognomen. The family name Ronaldson is characteristic of Ireland, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and Australia. Measured by absolute frequency, it most frequently occurs in the United Kingdom, Australia, and the United States. Very seldom, Ronaldson is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ronaldson | United Kingdom, Ireland, Australia, Brazil, United States |
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j. h. ronaldson Scottish geologist and mining engineer, GB (b. 1858) |
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| thomas ronaldson New Zealand cricketer, NZ (b. 1855) |
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| thomas martine ronaldson British painter (1881-1942), GB (b. 1881) |
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| alan ronaldson New Zealand cricketer, NZ (b. 1896) |
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| malcolm ronaldson South African cricketer (1917-2004), ZA (b. 1917) |
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craig ronaldson Irish rugby union player, IE (b. 1990) |
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| ken ronaldson Scottish footballer (b. 1945) |
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| john ronaldson Australian rules footballer (b. 1946) |
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| michael ronaldson Australian politician, AU (b. 1954) |
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| kevin ronaldson (b. 1958) |
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| tony ronaldson Australian basketball player, AU (b. 1972) |
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| james smith ronaldson Peerage person ID=394200 |
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| george ronaldson person associated with the witch trials in Scotland, GB |
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| j p ronaldson researcher |
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| margaret ronaldson accused of witchcraft, GB |
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