Arnarulunnguaq F.M.2 ([aɴ.ɑ.ʁu.lun.ŋu.ɑq] ong-aw-rhue-loon-ng'oo-awk; 1896 – 2 October 1933), a native Greenlander, was a key member of Knud Rasmussen's Fifth Thule Expedition (1921–1924) which crossed the Northwest Passage by dog sled.

She was one of the two who accompanied Rasmussen from the Hudson Bay to Alaska, preparing meals and keeping skins and furs in order throughout the two-year journey.

Rasmussen, Arnarulunnguaq and her cousin Qaavigarsuaq Miteq, a hunter, continued by dog sled for the next two years, proceeding under extreme conditions over unexplored Arctic territory all the way to the Bering Strait.

Arnarulunnguaq proved to be a vital member of the group; brought up as a hunter's wife and companion, she not only took care of preparing meals but created and maintained skins for clothing and helped build shelters of peat.

[7] Summing up her positive influence, Rasmussen tells us that Arnarulunnguaq had "that good humour about her that only a woman can instil [and was as] entertaining and courageous as any man when we were out on our journey.