Original sentence: In Croatia he is much celebrated and known by the Croat name 'Juraj Dalmantinac'.Some Croatian authors have claimed that his family name - Orsini - was not used by him and that his son took it only after death of his father - which remains a controversial claim.The Italian name 'Giorgio Orsini' is usually in international works (such us Encyclopædia Britannica Eleventh Edition).This is a  translation of 'Georgius Dalmaticus'
Edited sentence: In Croatia Orsini is known just with the Croat name 'Juraj Dalmantinac'.Some Croatian authors have claimed that his family name - Orsini - was not used by himself and that his son took it only after death of his father - however without any valid historic documents supporting this claim.The Italian names 'Giorgio Orsini' are regularly used in international works (such us Encyclopædia Britannica Eleventh Edition).This last name is anyway deprived of bases, being a recent translation of 'Georgius Dalmaticus'