Lady Isobel Constance Mary Gathorne-Hardy DCVO (née Stanley; 2 September 1875 – 30 December 1963) was a British courtier, best known for helping to popularize ice hockey in the early days of the sport in Canada.

The daughter of Frederick Stanley, 16th Earl of Derby, Governor General of Canada, and Lady Constance Villiers, she was one of the earliest European women known to have played the sport.

She retained her title upon marriage as the daughter of an earl and took on the family name of her husband, being styled Lady Gathorne-Hardy.

The award is presented by Hockey Canada to an active player (at any level) whose values, leadership and personal traits are representative of all female athletes.

[5] Updated January 7, 2024[6] The championship trophy of the Premier Hockey Federation was named the Isobel Cup in her honor.