Mare Australis is the last known foal out of Miramare (Rainbow Quest), who was placed three times at Listed level in Germany.

Second dam Minaccia (Platini) won a Listed race in Germany and produced five black-type performers, headed by Macleya (Winged Love), winner of the Gr.2 Prix de Pomone and the Gr.3 Prix Allez France, and Montclair (Montjeu), winner of the Gr.3 Prix de Barbeville. She is also the second dam of Mer et Nuages (Lope De Vega), winner of the Listed Prix de Pontarme and third in the Gr.2 Prix du Muguet, and Tribhuvan (Toronado), winner of the Grade 2 Fort Marcy S.

Third dam Maji (Shareef Dancer).

Fourth dam Majoritat (Konigsstuhl) was a champion in Germany and a dual Classic winner there (both then Gr.2), and is a close relative of the great Monsun.