jack nickname is for what name
Its origin is Variant of the English name John. Jack is a form of John and is generally pronounced like JAK. This name is mostly being used as a boys name. Last year it ranked 40th in the U.S. Social Security Administration list of most popular baby boy names. Jack is a nickname for the English name John. It derives from Jackin and Jankin, both of which are earlier medieval diminutives of John.