Trueshan is out of Shao Line (General Holme), who won twice, and has four winning half-siblings, among them Anecdotique (Enrique), dam of True Marvel (Masked Marvel), runner-up in the Gr.1 Sydney Cup. Shao Line is a half-sister to four winners, including Marie D'Altissima (Voix Du Nord), dam of the Listed-winning hurdler Marie Coastala.

Second dam Marie D'Altoria (Roi De Rome) is a half-sister to the Listed winner Dom Lurcy (Dom Racine).

Third dam Marie De Lempire (Faristan) ran only once; she had three winners, Marie D'Altoria and Dom Lurcy among them.

Further back, this is the family of the Classic winner Houmayoun, of the Group 1 winner and sire Flag Of Honour and of Sizing John, winner of the Gr.1 Cheltenham Gold Cup.

Shao Line's most recent foals are two fillies, one by Planteur born in 2021 and one by Golden Horde born in 2022, and she was covered by Planteur again in 2022.