Kernrechtsfrage
Whether calling the children by the mother's surname outside the private sphere violated the father's personality rights under Art. 28 ZGB.
Extrahierter Entscheid
Yes. Public use of a different surname created the impression of altered filiation or a disturbed father-child relationship and infringed the father's protected personality interests.
Extrahierte Begründung
The father-child relationship is part of the protected sphere of personality. Naming the children publicly with a surname different from their legal family name wrongly suggests a different descent or an officially sanctioned rupture of the relationship.