An individual can be known by a given name that is not their first given name, or not any of their given names.
In Germany, the call name (Rufname) is one of the official given names.
It is generally underlined when the name is written in full.
In the Netherlands, the call name (Roepnaam) may be one of the official given names, a
diminutive of one of the official given names, or some other name.
For example, the full name of the footballer Johan Cruyff is Hendrik Johannes Cruijff.
The roepnaam is often written in quotation marks, after the given names. For example Hendrik Johannes "Johan" Cruijff.
In the UK (and elsewhere), individuals can be known by a middle name.
For example, the full name of the former UK Prime Minister Boris Johnson is Alexander Boris de Pfeffel Johnson.
In many cases, the use of a middle name can be a family tradition.