The first parameter that we want to have for our user is it's name. Add a parameter to the method (you probably figured out how to do it by now). You can change the parameter's name and its type directly in the parameters viewer, in the method details page, or in the parameter details page. Change the name to familyName and the type to String.
We will add some choices now. A choice represents a value that can be taken by the parameter. A good test design should consider a set of typical values taken by the parameter, but also all corner cases. The parameter name is not constrained by any Java rules, it just needs to have a reasonable length. The choice value on the other hand must be a valid for the parameters type.