Danon Decile is the fourth foal of Top Decile (Congrats), who was twice placed at Grade 1 level in the US, finishing second in the Grade 1 Breeders' Cup Juvenile Fillies and the Grade 1 Alcibiades Stakes. He is a half-brother to the winners Top The Bill (American Pharoah) and Statistics (Heart's Cry) in Japan. Top Decile is a half-sister to Taswaheen (Mendelssohn), placed in the Gr.3 UAE Oaks, to the stakes-placed Ginjia (Quality Road) and to the winner Sheila Tequila (Kafwain), dam of the stakes winner Tequila Kiss.

Second dam Sequoia Queen (Forestry) won twice.

Third dam Barefoot Dyana (Dynaformer) was a multiple stakes winner in the US and had two winners, Sequoia Queen among them.

Danon Decile is also related to Q B Rocket (Gun Runner), third in the Grade 1 Breeders' Futurity in the US.

Top Decile has eight foals in all, the latest a colt by Contrail born in 2026.