Wide island or from Sidon
A modern spelling variant of Sydney. It likely derives from the Old English 'sidan' meaning wide and 'eg' meaning island, or refers to the ancient Phoenician city of Sidon.
Less common today
Cydne isn't in the latest US Top 1000. It last peaked at #7,848 in 1997.
US births per 5-year period, 1990βpresent (SSA data).
American local government official