Serpentine is out of Remember When (Danehill Dancer), winner of the Listed Victor McCalmont Memorial S. and placed second in the 2010 Gr.1 Epsom Oaks. All her produce are by Galileo: Wedding Vow, winner of the Gr.2 Kilboy Estate S. and second in the Gr.1 Nassau S., Bye Bye Baby, winner of the Gr.3 Blue Wind S. and third in the 2018 Gr.1 Epsom Oaks, Beacon Rock, winner of the Gr.3 Gallinule S., and Bound, winner of the Listed Trigo S.

Second dam Lagrion (Diesis).

Third dam Wrap It Up (Mount Hagen).

Remember When is a three-parts-sister to the champion Dylan Thomas (Danehill), winner of the Gr.1 Prix de l'Arc de Triomphe and the Gr.1 Irish Derby. She is also related to Homecoming Queen (Holy Roman Emperor), winner of the Gr.1 1000 Guineas, and Queen's Logic (Grand Lodge), winner of the Gr.1 Cheveley Park S. and second dam of Queen Kindly (Frankel), winner of the Gr.2 Lowther S.

Remember When has an unnamed 2-year-old colt and a yearling colt, both by Galileo.