Highwayman is out of Salyana (Harlan's Holiday), who ran once in France as a three-year-old. She is a half-sister to Sayed (Stormy Atlantic), third in the Listed Wyong Gold Cup. He is the most recent of her four foals and the best of her two winners.

Second dam Saliyna (Linamix) won twice and has three winners, the best of them Sayed. She is a full sister to Slickly, a four-time Group 1 winner and sire.

Third dam Slipstream Queen (Conquistador Cielo) won in the US and was twice placed at stakes level. Besides Saliyna and Slickly she produced seven winners, among them the sire No Slip (Exit To Nowhere), a Grade 2 winner in the US, and Sichilla (Danehill), a Listed winner in France. Sichilla is the dam of the Group 1 winners Siyouni (Pivotal), winner of the Gr.1 Prix Jean-Luc Lagardere and a successful sire, and Siyouma (Medicean), winner of the Gr.1 Sun Chariot Stakes and the Grade 1 E P Taylor Stakes, and the grandam of Siyarafina (Pivotal), a Group 1 winner in France.

Country Queen (Explodent), a Grade 1 winner in the US, produced six winners, Slipstream Queen among them.