Doaitsen 420 was born in the United States, to Klaas and Mares Vanderploeg, a son of Wander 353 and Wieke van Schuilenburg Model Preferent Prestatie (Reitse 272) out of line 163. The impressive Doaitsen 420 was unprecedentedly popular with breeders: in his peak year of 2009, the year he became the overall reserve champion at the Stallion Show, he covered more than four hundred mares.

His sons and daughters are doing well at inspections and in the sport; Doaitsen 420 was also definitively approved for pedigree. Doaitsen 420 has had a positive influence in breeding on conformation and movement. In 2013, Doaitsen 420 moved back to the United States when he was owned by the Page family of Maddis Friesian Ranch in Gardnerville, Nevada where he was the stablemate of Andries 415. Doaitsen 420 leaves four approved sons: Bene 467, Gerben 479, Sake 449 and Sjouke 453.