[Serializer] Name Converter

| Q                | A
| --------------- | ---
| Doc fix?      | no
| New docs? | yes symfony/symfony#13120
| Applies to   | 2.7

This is the documentation for the Serializer Name Converter feature.
AFAIK "given name" is used mainly in the US and "first name" is the preferred term for UK english. Given name is less ambiguous because in some countries (such as China) the first name (in order of writing) isn't the given name but the equivalent to the family name.