Excellent Truth is out of Moment of Truth (Teofilo), who was unplaced. Moment of Truth has four winners from five runners, among them Memo de L'Alguer (Mehmas), a four-time winner who was group-placed in Italy. She is a half-sister to Zafisio (Efisio), winner of the Gr.1 Criterium International in France, and to the Group 2-placed dual winner Lansky (Dark Angel).

Second dam Goldthroat (Zafonic) won once and produced nine winners, Zafisio the best of them. She is also the grandam of Shandy (Starspangledbanner), winner of the Gr.3 Ballyogan S., and of Spycatcher (Vadamos), a group winner who took the Gr.3 Prix de Ris-Orangis and was multiple Group 1-placed, including second in the Gr.1 Prix Maurice de Gheest.

Third dam Winger (In The Wings) was a winner.

Her youngest reported half-sibling is the 2-year-old colt Armstrong (Starman), placed on his debut. Moment of Truth was covered by Good Guess last year.