I’m looking for a way to display an alternative name as part of a Relationship graph. Many of my extended family members Americanized their names when they came to the United States. I’ve been using birth names in the report, but many of my cousins have requested that I use the American names, as those are the names they knew for their parents and grandparents. I could record the preferred name as something like " Rifka (Rebecca) Sinienski (Schiller)" with the American versions of both the given name and the surname in parentheses, but this seems awkward.
You can use the Call field for the Rebecca entry. Even though it will be displayed Red because it is not a part of the Given name field, Gramps will still accept it. You as the Gramps user will be the only one to see the field in red.
For the surname alternate, there is a Family Nick Name field in the Name Editor.. The family nick name is handled along with the Surname which is different than the Nick Name field of the person.