Original sentence: He had a head start in the theatrical profession, being the grandson of actress Kate Terry and the great nephew of Dame Ellen Terry, Marion Terry, Fred Terry, and all their actor siblings.His elder brother Val Gielgud was a pioneering influence in BBC Radio
Edited sentence: He was of a noble theatrical lineage, being the grandson of actress Kate Terry and the great nephew of the best-loved actress of her day, Dame Ellen Terry, as well as of Marion Terry, Fred Terry, and all their actor siblings.His elder brother Val Gielgud came to be a pioneering influence in BBC Radio