The boy's name Sly \s-ly\ is a variant of Sylvester.
The baby name Sly sounds like Sal, Sol, Seely, Sela, Sill and Sully. Other similar baby names are Aly, Bly, Ely and Sky.
Sly is a very rare male first name and a very popular surname (source: 1990 U.S. Census). Displayed below is the baby name popularity trend for the boy's name Sly. Click here to compare Sly with related baby names.
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