Midge's dam was another imported mare named Sandfly by the English stallion Isonomy. He was the third highest ranked horse of the 1870s, behind Isonomy and Cremorne. The event is named after Isonomy, a successful racehorse in the late 19th century. In this poll, West Australian finished third behind Gladiateur and Isonomy. It was subsequently eclipsed until brought back into English as isonomy ("equality of law"). The Prix Isonomy was run at Saint-Cloud over 1,600 metres in 1996. The plan failed, as Westbourne finished second to Chippendale, with Isonomy in fourth. The Prix Isonomy is a Listed flat horse race in France open to two-year-old thoroughbreds. Isonomy was ridden in most of his races by Tom Cannon. In this poll, Isonomy finished second, one vote behind Gladiateur. Isonomy went on to be the most successful horse of the season in England. Isonomy ran twice as a five-year-old and won both his races. As a two-year-old, Isonomy showed promise, without appearing to be top class.