"The case concerns a child who was born in Denmark having, as well as his parents, only German nationality. The child was registered in Denmark – in accordance with Danish law – under the compound surname Grunkin-Paul combining the name of his father (Grunkin) and the name of his mother (Paul), who did not use a common married name. After moving to Germany, German authorities refused to recognise the surname of the child as it had been determined in Denmark" -> ECJ verdict against Germany and in favour of the child and parents!