This led writers, such as Stephen Oppenheimer and Bryan Sykes, to conclude that the majority of Irish people primarily descend from an "Iberian refugium" population bottleneck dating back to the last ice age.
Isto levou a investigadores como Stephen Oppenheimer e Bryan Sykes a considerar que a maioría da poboación irlandesa descende pricipalmente dun "refuxio ibérico" anterior á última glaciación.