Beatles legend Paul McCartney has eight grandchildren ... He is the eldest son of Mary and her ex-husband, TV producer Alistair Donald. Arthur attended University College School in north London ...

Donald is one of Paul McCartney's grandchildren. (Arthur's parents are Paul's daughter Mary McCartney and her ex-husband, Alistair Donald.) Phoebe and Arthur's families go way back as well.

Arthur is the oldest of McCartney’s eight grandchildren. The Yale University graduate is the eldest son to The Beatles member's daughter, Mary, and her ex-husband, Alistair Donald.

She shared another photo with Arthur, the son of the Mary McCartney and her husband Alistair Donald. She could be seen wearing a blue silk dress and Donald rocked a navy blue blazer, matching t ...