Cognomen Castledine (Castledine 
) , across the world, is quite a rare surname. The surname Castledine is characteristic of Isle of Man, where it is quite a rare surname, Australia, and the United Kingdom, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in the United Kingdom, Australia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Castledine | Canada, New Zealand, Australia, United States, United Kingdom |
| reginald sidney castledine (b. 1892) |
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| fred castledine Australian rules footballer, AU (b. 1937) |
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| annie castledine Theatre Director, GB (b. 1939) |
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| george castledine Nursing administrator and civil servant, GB (b. 1940) |
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| gary castledine Scottish professional footballer (born 1970), GB (b. 1970) |
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| andre j. castledine researcher |
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| meaghan castledine researcher |
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| chantal castledine Australian judoka, AU (b. 1982) |
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