Question: Greenland saga relates to the colonization of Greenland by the viking of what nationality?

Context articles: Tanfield Valley
Þórkell Þórmóðarson
Ögmundar þáttr dytts
The Saga of Ref the Sly
Straumfjörð
Flóamanna saga
Greenland saga
Króka-Refs saga
Leifsbudir
Erik the Red

Tanfield Valley, also referred to as Nanook, is an archaeological site located on the southernmost projection of Baffin Island in the Canadian territory of Nunavut.
 It is possible that the site was known to Pre-Columbian Norse explorers from Greenland and Iceland.
 It may be in the region of "Helluland", spoken of in the Icelandic sagas ("Greenland Saga" and "Saga of Erik the Red").
Þórkell Þórmóðarson is a character from the mediaeval "Hákonar saga Hákonarsonar", a kings' saga composed in the last half of the 13th century.
 The saga relates that in about the year 1230, a Norwegian-Hebridean fleet sailed down through the Hebrides, where it attacked certain islands there, and proceeded on to the Isle of Man.
 As the fleet made its way southward through the Hebrides, several members fought a battle with Þórkell at "Vestrajǫrðr", near Skye.
 The exact location of "Vestrajǫrðr" is unknown, although Loch Bracadale, Loch Dunvegan, and Loch Snizort, all located on the western coast of Skye, have been proposed as possible locations.
 According to the saga, Þórkell and two of his sons were slain in the encounter, however a third son, named "Þórmóðr", managed to escape with his life.
 Early the next year, the fleet headed northwards through the Hebrides back home.
 When it approached the island of Lewis, a man named "Þórmóðr Þórkelson" fled for his life, leaving behind his wife and possessions to be taken by the marauding fleet.
Ögmundar þáttr dytts ok Gunnars helmings is one of the Icelandic "þættir".
 It was written in the 14th century.
 It relates the story of Ögmundr dyttr, a cousin of Víga-Glúmr from Víga-Glúms saga.
 He is insulted in Norway and achieves revenge in a clever way.
 The second part of the saga relates the adventures of Gunnarr helmingr and his interaction with a cult of Freyr in Sweden.
The Saga of Ref the Sly takes place from 950-1050, although it seems the story lacks much historical basis based upon the timeline used.
 Although probably first recorded between 1350-1400, the only remaining complete manuscript is dated to the later half of the fifteenth century.
 The saga takes place over much of the Viking world, beginning in Iceland, and continuing on in Greenland, Norway, and Denmark.
 Unlike many of the other Icelandic sagas, which often revolve around Christian ideals, this saga seems to be one that was created mainly for pure enjoyment.
Straumfjörð Icelandic), or Straumfjǫrð (Old Norse) sometimes anglicised to Straumsfjordr, Straumfjordr, Straumsfjord or Straumfjord, is according to the Sagas of Icelanders a fjord in Vinland where Thorfinn Karlsefni set up a temporary settlement.
 It is described in the "Saga of Erik the Red", but not in the "Greenland saga".
 Its name translates to "Current-fjord", "Stream-fjord" or "Tide-fjord".
Flóamanna saga (   'the saga of the men of Flói'), also known as Þorgils saga Ørrabeinsstjúps ('the saga of Þorgils, foster-son of Ørrabeinn') is one of the sagas of Icelanders.
 The saga has been especially noted for the realistic depiction of the main character's journey to Greenland, which may reflect the author's own experience of such a journey, or an informant's.
Grœnlendinga saga (   ) (spelled Grænlendinga saga in modern Icelandic and translated into English as the Saga of the Greenlanders) is one of the sagas of Icelanders.
 Along with "Saga of Erik the Red", it is one of the two main literary sources of information for the Norse exploration of North America.
 It relates the colonization of Greenland by Erik the Red and his followers.
 It then describes several expeditions further west led by Erik's children and Þorfinnr "Karlsefni" Þórðarson.
Króka-Refs saga (   ) or the Saga of Ref ('Fox') the Sly is one of the Icelanders' sagas.
 Written in the 14th century the saga relates the adventures of Ref Steinsson, a "coal-biter" or "male Cinderella", whose unpromising origins lead him to greatness in both combat and subterfuge.
Leifsbudir (Old Norse: Leifsbuðir) was a settlement, mentioned in the Greenland Saga, founded by Leif Eriksson in 1000 or 1001 in Vinland.
Erik Thorvaldsson (Old Norse: "Eiríkr Þorvaldsson" ; 950 – c. 1003), known as Erik the Red (Old Norse: "Eiríkr hinn rauði" ) was a Norwegian Viking, remembered in medieval and Icelandic saga sources as having founded the first Norse settlement in Greenland.
 The Icelandic tradition indicates that he was born in the Jæren district of Rogaland, Norway, as the son of Þorvald Ásvaldsson, he therefore also appears, patronymically, as Erik Thorvaldsson ("Eiríkr Þorvaldsson").
 The appellation "the Red" most likely refers to his hair color and the color of his beard.
 Leif Erikson, the famous Icelandic explorer, was Erik's son.