Original sentence: Some Croatian authors have claimed that his family name - Orsini - was not used by him and that his son took it only after the death of his father, so that he was a Croat.The Italian name 'Giorgio Orsini' was always used in international works (such as Encyclopædia Britannica Eleventh Edition)
Edited sentence: Anyway,  some Croatian authors have recently claimed that his family name - Orsini - was not used by him and that his son took it only after the death of his father, so that he was a Croat.On the other side the Italian name 'Giorgio Orsini' was always used in international works (such as Encyclopædia Britannica Eleventh Edition)