Ships island or chalk landing place
Shelsey is a modern variation of the English name Chelsea. It likely derives from the Old English words 'cealc' meaning chalk and 'hythe' meaning a landing place or port. While rare, it follows the pattern of adding a soft 'Sh' sound to established place-names.
Less common today
Shelsey isn't in the latest US Top 1000. It last peaked at #6,800 in 1997.
US births per 5-year period, 1990βpresent (SSA data).