Li (surname 李) in the context of "Sasanian dynasty"

The Sasanian dynasty (also known as the Sassanids or the House of Sasan), the last Persian lineage of rulers to achieve hegemony over much of Western Asia before Islam, ruled 224 CE–650 CE. the house of Sasan founded the Sasanian Empire of Iran, It began with Ardashir I, who named the dynasty in honour of his predecessor, Sasan.

The Shahanshah was the sole regent, head of state and head of government of the empire. At times, power shifted de facto to other officials, namely the spahbed. Upon the empire's conquest by the Islamic caliphate in 651, members of the imperial family fled in exile to China following the death of Yazdegerd III, where they would become accepted as members of the imperial court by Emperor Gaozong of Tang. Although there would be numerous attempts to invade Islamic Persia with Chinese support, this branch of Sasanids would remain in China indefinitely. Narsieh, grandson of Yazdegerd and last recorded Sasanid in China, would adopt the surname Li (李) in honor of the Chinese imperial family.

The Qian Mausoleum (Chinese: 乾陵; pinyin: Qiánlíng) is a Tang dynasty (618–907) tomb site located in Qian County, Shaanxi Province, China, and is 85 km (53 mi) northwest of Xi'an. Built in 684 (with additional construction until 706), the tombs of the mausoleum complex house the remains of various members of the House of Li, the imperial family of the Tang dynasty. This includes Emperor Gaozong (r. 649–83), as well as his wife, Wu Zetian, who assumed the Tang throne and became China's only reigning female emperor from 690 to 705. The mausoleum is renowned for its many Tang dynasty stone statues located above ground and the mural paintings adorning the subterranean walls of the tombs. Besides the main tumulus mound and underground tomb of Emperor Gaozong and Wu Zetian, there are 17 smaller attendant tombs, or peizang mu. Presently, only five of these attendant tombs have been excavated by archaeologists, three belonging to members of the imperial family, one to a chancellor, and the other to a general of the left guard. The Shaanxi Administration of Cultural Heritage declared in 2012 that no further excavations would take place for at least 50 years.

Laozi (/ˌlaʊˈtsʌ/ low-TSUH; Chinese: 老子; pinyin: Lǎozǐ) was a legendary Chinese philosopher considered to be the author of the Tao Te Ching (Laozi), one of the foundational texts of Taoism. The name, literally meaning 'Old Master', was likely intended to portray an archaic anonymity that could converse with Confucianism. Modern scholarship generally regards his biographical details as later inventions and his opus a collaboration of various writers. Traditional accounts addend him as Li Er, born in the 6th-century BC state of Chu during China's Spring and Autumn period (c. 770 – c. 481 BC). Serving as the royal archivist for the Zhou court at Wangcheng (modern Luoyang), he met and impressed Confucius (c. 551 – c. 479 BC) on one occasion, composing the Tao Te Ching in a single session before retiring into the western wilderness.

A central figure in Chinese culture, Laozi is generally considered the founder of Taoism. He was claimed and revered as the ancestor of the Tang dynasty (618–907) and is similarly honored in modern China as the progenitor of the popular surname Li. In some sects of Taoism, Chinese Buddhism, Confucianism, and Chinese folk religion, it is held that he then became an immortal hermit. Certain Taoist devotees held that the Tao Te Ching was the avatar – embodied as a book – of the god Laojun, one of the Three Pure Ones of the Taoist pantheon, though few philosophers believe this.

Chinese surnames are used by Han Chinese and Sinicized ethnic groups in Greater China, Korea, Vietnam and among overseas Chinese communities around the world such as Singapore and Malaysia. Written Chinese names begin with surnames, unlike the Western tradition in which surnames are written last. Around 2,000 Han Chinese surnames are currently in use, but the great proportion of Han Chinese people use only a relatively small number of these surnames; 19 surnames are used by around half of the Han Chinese people, while 100 surnames are used by around 87% of the population. A report in 2019 gives the most common Chinese surnames as Wang and Li, each shared by over 100 million people in China. The remaining eight of the top ten most common Chinese surnames are Zhang, Liu, Chen, Yang, Huang, Zhao, Wu and Zhou.

Two distinct types of Chinese surnames existed in ancient China, namely xing (Chinese: 姓; pinyin: xìng) ancestral clan names and shi (Chinese: 氏; pinyin: shì) branch lineage names. Later, the two terms were used interchangeably, and in the present day, xing refers to the surname and shi may refer either the clan or maiden name. The two terms may also be used together as xingshi for family names or surnames. Most Chinese surnames (xing) in current use were originally shi. The earliest xing surname might be matrilinear, but Han Chinese family name has been exclusively patrilineal for a couple of millennia, passing from father to children. This system of patrilineal surnames is unusual in the world in its long period of continuity and depth of written history, and Chinese people may view their surnames as part of their shared kinship and Han Chinese identity. Women do not normally change their surnames upon marriage, except sometimes in places with more western influences such as Hong Kong. Traditionally Chinese surnames have been exogamous in that people tend to marry those with different surnames.

The Tuoba (Chinese) or Tabgatch (Old Turkic: 𐱃𐰉𐰍𐰲, Tabγač), also known by other names, was an influential Xianbei clan in early imperial China. During the Sixteen Kingdoms after the fall of Han and the Three Kingdoms, the Tuoba established and ruled the Dai state in northern China. The dynasty ruled from 310 to 376 and was restored in 386. The same year, the dynasty was renamed Wei, later distinguished in Chinese historiography as the Northern Wei. This powerful state gained control of most of northern China, supporting Buddhism while increasingly sinicizing. As part of this process, in 496, the Emperor Xiaowen changed the imperial clan's surname from Tuoba to Yuan (元). The empire split into Eastern Wei and Western Wei in 535, with the Western Wei's rulers briefly resuming use of the Tuoba name in 554.

A branch of the Tanguts also bore a surname transcribed as Tuoba before their chieftains were given the Chinese surnames Li (李) and Zhao (趙) by the Tang and Song dynasties respectively. Some of these Tangut Tuobas later adopted the surname Weiming (嵬名), with this branch eventually establishing and ruling the Western Xia in northwestern China from 1038 to 1227.