Sidney's name (fraternal) twin, Sydney, has become mega-fashionable as a girls' name lately, and Sidney with an 'i' is riding on her coattails to also experience revived popularity. Perhaps it's the association with actor Sidney Poitier that keeps most parents gravitating towards Sydney with a 'y' for their baby girls instead. But who wants to be just like everyone else?
How popular is Sidney? Here's how many babies were named Sidney over time, according to the U.S. Social Security Administration.
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