Stefan di Quattro is the first offspring of the Maharajah mare Begum Kronos (1.12,9 – SEK 386.450). This damline goes back to Emilie Cas El, sister of the influential sires Andover Hall, Angus Hall and Conway Hall.

The most important offspring of Emilie Gas El is Hambletonian winner Trixton.

Stefan di Quattro is raised at Silvåkra Gård