Although they are not usually considered a Celtic nation, the Faroe Islands have a population with a large Celtic heritage in genetic terms. Recent DNA analyses have revealed that Y chromosomes, tracing male descent, are 87% Scandinavian, whereas the mitochondrial DNA, tracing female descent, is 84% Celtic. The same can be said about Icelanders. The founder population of Iceland came from Ireland, Scotland, and Scandinavia: studies of mitochondrial DNA and Y-chromosomes indicate that 62% of Icelanders' matrilineal ancestry derives from Scotland and Ireland (with most of the rest being from Scandinavia), while 75% of their patrilineal ancestry derives from Scandinavia (with most of the rest being from the Irish and British Isles). In addition, there are some areas of the accepted Celtic countries whose population are mostly not of Celtic heritage: for example, the Orkney and Shetland Islands in Scotland have populations of mostly Nordic descent.