No Speak Alexander is the first foal of Rapacity Alexander (Dandy Man), winner of the Listed Prix La Fleche and a full sister to Peniaphobia, who won the Gr.1 Hong Kong Sprint.

Second dam Umlani (Great Commotion).

Fourth dam Quiet Harbour (Mill Reef) produced Cutting Reef (Kris), Listed Prix Right Royal winner and a stakes producer, the stakes winner Jazz Ballet (Jaazeiro) and Guest Harbour (Be My Guest), placed in the Gr.3 Premio Ambrosiano and the dam of Benvenue (Iffraaj), winner of the Gran Premio di Milano, then a Group 1. This is also the family of Quiet Fling (Nijinsky), who took the Gr.1 Coronation Cup, and of Wandesta (Nashwan), a multiple Grade 1 winner whose victories include the Grade 1 Matriarch Stakes.

Rapacity Alexander's two-year-old filly Making Music (Mastercraftsman) has been placed twice.