Bred: Stonethorn Stud Farms Ltd. (Ire.)
Sire: Invincible Spirit (IRE)
Dam: Greenisland (IRE), by Fasliyev
Shamshon (IRE) won his first two races for owner Sheikh Joaan bin Hamad Al Thani, traveling to two different countries to rack up the victories. He finished fifth in his first group stakes attempt.
By Invincible Spirit (IRE), Shamshon is out of the graded placed Greenisland (IRE), who is a half sister to stakes winner Ithoughtitwasover. Her third dam is Grade 1 placed Green Lucia, who is also a half-sister to multi-champion Old Vic (GB).