Hedwick Wilhelmina "Granny" McDonald (28 April 1893 – 5 October 1959) was a New Zealand racehorse trainer.

She was born in Hastings, Hawke's Bay, New Zealand on 28 April 1893.

[1] She was the trainer of the 1938 Melbourne Cup winner Catalogue.

Thus, Catalogue was entered into the Melbourne Cup with Hedwick's husband Allan as the official registered trainer.

This New Zealand horse racing biographical article is a stub.