Question: Which common Chinese surname is the surname of the Tibetan princess known as Gyasa?

Context paragraphs:
Qin (surname): Qín ( ) (秦) is a common Chinese surname.  "Qin" is the hanyu pinyin romanization of the surname for Mandarin, the common dialect of China; other romanizations of the surname include Chin and Jin in Mandarin, Ceon and Cheun in Cantonese, and Tan in Vietnamese.  People with this surname are most commonly found in Henan, Shaanxi, Shandong, Sichuan, Hubei and Hebei.

Zhang (surname): Zhang ( ) is the pinyin romanization of the very common Chinese surname written 张 in simplified characters and 張 traditional characters.  It is spoken in the first tone: "Zhāng".  It is a surname that exists in many languages and cultures, corresponding to the surname 'Archer' in English for example.  Chang is the Wade-Giles romanization; Cheung was commonly used in Hong Kong as romanization.

Li (surname 李): Li () is the second most common surname in China, behind only Wang.  It is one of the most common surnames in the world, shared by 92.76 million people in China, and more than 100 million worldwide.  It is the fourth name listed in the Song dynasty classic text "Hundred Family Surnames".

Xia (surname): Xia is the Mandarin pinyin romanization of the Chinese surname written 夏 in Chinese character.  It is romanized Hsia in Wade–Giles, and Ha in Cantonese.  Xia is the 154th surname in the Song dynasty classic text "Hundred Family Surnames".  As of 2008, it is the 66th most common Chinese surname, shared by 3.7 million people.

Ma (surname): Ma () is a Chinese family name.  The surname literally means "horse".  It is one of the most common family names in China.  As of 2006, it ranks as the 14th most common Chinese surname in Mainland China and the most common surname within the Chinese community, specifically the Hui people, Dongxiang people, and Salar people.

Kok (surname): Kok is either a Dutch occupational surname, "kok" meaning "cook", or an alternate spelling for the common Chinese surname Guo.  Kok is a quite common surname in the Netherlands, ranking 27th in 2007 (20,834 people).  Famous people with the surname Kok include:

Li (surname): Li is the pinyin and Wade–Giles romanization (spelled Lí, Lǐ, or Lì when pinyin tone diacritics are used) of several distinct Chinese surnames that are written with different characters in Chinese.  Li 李 is by far the most common among them, shared by 93 million people in China, and more than 100 million worldwide.  It is the second most common Chinese surname behind Wang and the most common surname in Canada .

Wei (surname): Wei (魏, 韋, 衛, 尉, 隗) is a Chinese surname.  It was ranked the 122nd most common Chinese surname in 2006.  Wei (魏) is the name used for the Kingdom of Wei.

Bai (surname): Bái is the pinyin romanisation of the common Chinese surname , meaning the colour white.  With its variants, Bai was ranked 79th within the list of common Chinese surnames in 2006, down from 70th in 1990.

Princess Wencheng: Princess Wencheng (Tibetan: Mung-chang Kungco; ; 628–680/2 ), surnamed Li, was a member of a minor branch of the royal clan of the Chinese Tang dynasty.  In 641, she was granted by Emperor Taizong of Tang to King Songtsän Gampo of Tibet for marriage, an involuntary actor of the emperor's "heqin" (marriage alliance) policy.  She is popularly known in Tibet as Gyasa, or "Chinese wife".

Supporting paragraphs: Princess Wencheng Li (surname 李)
Answer: Li