Invincible Sage is out of Thorsborne (Hinchinbrook), who won four races in Australia; he is her second foal and her only winner. She is a full sister to the Group 2 winner Diamond Tathagata and a half-sister to Ancestry (The Brothers War), twice a Listed winner.

Second dam Maltese (Tale of the Cat) was a triple winner in Australia; besides Thorsborne she has four winners, among them Diamond Tathagata and Ancestry.

Third dam Marwell Lady (Lord Seymour) won at Listed level in Melbourne and has eight other winners. The best of them are the Listed winner Jestarella Boy (Rory's Jester) and the Listed-placed full sisters Jolly's Folly and La Bird, both by Bluebird.

Thorsborne is also the dam of the unraced 2-year-old filly Eight Gorillas (Fiorente), plus a yearling filly by Trapeze Artist.