Wide island or south island
Derived from Old English elements meaning 'wide' and 'island' or 'water meadow'. It was originally a surname and later became a popular given name for both boys and girls, often associated with the aristocratic Sidney family in England.
About 146 boys were named Sidney in 2025.
US births per 5-year period, 1990–present (SSA data).
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The same feel as Sidney — far less common.
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