1. I venture no opinion on these matters, save to say that, for the sake of good order, it seems necessary to envisage three hypotheses (all based on the premiss that both sets of rules refer to the law of the adoptee’s nationality): (i) that the surname designated in the Kreisgericht Worbis’s supplementary decision has always been legitimate in both German and Austrian law; (ii) that, while it may have been thought legitimate at the time, subsequent case-law has revealed it not to have been so; and (iii) that it has never been legitimate from the point of view of either legal system.