The name K2 is derived from the notation used by the Great Trigonometrical Survey of British India.
Thomas Montgomerie made the first survey of the Karakoram from Mount Haramukh, some 210 km (130 mi) to the south, and sketched the two most prominent peaks, labeling them K1 and K2, where the K stands for Karakoram.

The policy of the Great Trigonometrical Survey was to use local names for mountains wherever possible and K1 was found to be known locally as Masherbrum.
K2, however, appeared not to have acquired a local name, possibly due to its remoteness.
The mountain is not visible from Askole, the last village to the south, or from the nearest habitation to the north, and is only fleetingly glimpsed from the end of the Baltoro Glacier, beyond which few local people would have ventured.
The name Chogori, derived from two Balti words, chhogo ("big") and ri ("mountain") (چھوغوری) has been suggested as a local name, but evidence for its widespread use is scant.
It may have been a compound name invented by Western explorers or simply a bemused reply to the question "What's that called?"
It does, however, form the basis for the name Qogir (simplified Chinese: 乔戈里峰; traditional Chinese: 喬戈里峰; pinyin: Qiáogēlǐ Fēng) by which Chinese authorities officially refer to the peak.
Other local names have been suggested including Lamba Pahar ("Tall Mountain" in Urdu) and Dapsang, but are not widely used.

With the mountain lacking a local name, the name Mount Godwin-Austen was suggested, in honor of Henry Godwin-Austen, an early explorer of the area.
While the name was rejected by the Royal Geographical Society, it was used on several maps and continues to be used occasionally.

The surveyor's mark, K2, therefore continues to be the name by which the mountain is commonly known.
It is now also used in the Balti language, rendered as Kechu or Ketu (Balti: کے چو‎ Urdu: کے ٹو‎).
The Italian climber Fosco Maraini argued in his account of the ascent of Gasherbrum IV that while the name of K2 owes its origin to chance, its clipped, impersonal nature is highly appropriate for so remote and challenging a mountain.
He concluded that it was:
... just the bare bones of a name, all rock and ice and storm and abyss.
It makes no attempt to sound human.
It is atoms and stars.
It has the nakedness of the world before the first man – or of the cindered planet after the last.

André Weil named K3 surfaces in mathematics partly after the beauty of the mountain K2.
The name K2 is derived from the notation used by the Great Trigonometrical Survey of British India. Thomas Montgomerie made the first survey of the Karakoram from Mount Haramukh, some 210 km (130 mi) to the south, and sketched the two most prominent peaks, labeling them K1 and K2, where the K stands for Karakoram.
The policy of the Great Trigonometrical Survey was to use local names for mountains wherever possible and K1 was found to be known locally as Masherbrum. K2, however, appeared not to have acquired a local name, possibly due to its remoteness. The mountain is not visible from Askole, the last village to the south, or from the nearest habitation to the north, and is only fleetingly glimpsed from the end of the Baltoro Glacier, beyond which few local people would have ventured. The name Chogori, derived from two Balti words, chhogo ("big") and ri ("mountain") (چھوغوری) has been suggested as a local name, but evidence for its widespread use is scant. It may have been a compound name invented by Western explorers or simply a bemused reply to the question "What's that called?" It does, however, form the basis for the name Qogir (simplified Chinese: 乔戈里峰; traditional Chinese: 喬戈里峰; pinyin: Qiáogēlǐ Fēng) by which Chinese authorities officially refer to the peak. Other local names have been suggested including Lamba Pahar ("Tall Mountain" in Urdu) and Dapsang, but are not widely used.
With the mountain lacking a local name, the name Mount Godwin-Austen was suggested, in honor of Henry Godwin-Austen, an early explorer of the area. While the name was rejected by the Royal Geographical Society, it was used on several maps and continues to be used occasionally.
The surveyor's mark, K2, therefore continues to be the name by which the mountain is commonly known. It is now also used in the Balti language, rendered as Kechu or Ketu (Balti: کے چو‎ Urdu: کے ٹو‎). The Italian climber Fosco Maraini argued in his account of the ascent of Gasherbrum IV that while the name of K2 owes its origin to chance, its clipped, impersonal nature is highly appropriate for so remote and challenging a mountain. He concluded that it was:
... just the bare bones of a name, all rock and ice and storm and abyss. It makes no attempt to sound human. It is atoms and stars. It has the nakedness of the world before the first man – or of the cindered planet after the last.
André Weil named K3 surfaces in mathematics partly after the beauty of the mountain K2.
K2