Sibayan is the second foal of Sirrin (Sea The Stars), a multiple stakes winner in France who took the Listed Prix Joubert and the Listed Derby du Languedoc. He is the best of her two winners and a half-brother to the winning Sirana (Siyouni).

Second dam Sindirana (Kalanisi) won the Listed Lingfield Oaks Trial and has five winners, among them Sinkal (Smart Strike), a Gr.3-placed winner who raced as Doyeni in Hong Kong. She is also the second dam of Sonaiyla (Dark Angel), winner of the Gr.3 Ballyogan Stakes and third in the Gr.1 Flying Five. Sindirana is a full sister to Sindiyma, a winner over 1m4f in Ireland and dam of the sire Marie's Diamond, winner of the Gr.3 Anglesey Stakes and Gr.1-placed, and of Sikandarabad, a Listed winner in Australia and Gr.1-placed.

Third dam Sinndiya (Pharly) was a winner and has seven winners. She is a half-sister to the sire Sinndar (Grand Lodge), who won four Group 1 races including the Gr.1 Derby, the Gr.1 Irish Derby and the Gr.1 Arc.

Sirrin also has an unraced 3-year-old colt named Sirsar (Le Havre) and a yearling filly by Too Darn Hot.