I-Newfoundland ludidi lwezinja oluthiywe ngegama lengingqi eziqale ukuvela kuyo ezi zinja. Nangona olu hlobo ngoku luthathwa njengeKhanada, enyanisweni, ngexesha lokubonakala kwayo, lo mmandla wawungowamaIndiya, emva koko wavela eUnited States, naseCanada, njengelizwe elahlukileyo. Okwangoku, abaphandi abanakukwazi ukutsho ngokuthe ngqo ukuba uhlobo lwenziwa njani, kwaye zeziphi izinja ezibandakanyekayo.
Kukho iithiyori ezininzi, akukho nanye kuzo enobungqina obaneleyo njengechaneke ngokungathandabuzekiyo. Ithiyori yokuqala yeyokuba malunga nenkulungwane ye-15 neye-16, ngenxa yokuwela iintlobo ezininzi zezinja, phakathi kwazo, ngokutsho kwabalimi bezinja, yayingabalusi basePyrenean, iiMastiffs, kunye nezinja zamanzi zasePortugal, uhlobo esilwazi ngoku njenge. Kwazalwa iNewfoundland.