The name Khai is believed to have its origins in the Thai language and culture. It is a unisex name that has been in use for centuries in Thailand and surrounding regions. The name Khai is derived from the Thai word "khai," which means "egg" or "embryo," symbolizing new life and potential.

In ancient Thai literature, the name Khai is mentioned in several historical records and texts, particularly those related to Buddhism and Thai folklore. It is said that the name was often given to children born during the Thai New Year celebration, known as Songkran, which marks the beginning of the traditional Thai solar calendar.

One of the earliest recorded examples of the name Khai dates back to the 13th century, during the Sukhothai Kingdom, a prominent Thai kingdom that flourished from 1238 to 1438 CE. Historical records mention a revered Buddhist monk named Khai Nok, who was known for his wisdom and teachings.

Throughout history, there have been several notable individuals who bore the name Khai. One such figure was Khai Nuan, a renowned Thai painter and artist who lived in the 19th century and is celebrated for his intricate and vibrant murals adorning the walls of various temples and royal palaces in Thailand.

Another prominent individual with the name Khai was Khai Mueang, a legendary Thai warrior and military commander who lived during the Ayutthaya Kingdom (1351-1767 CE). He is celebrated for his bravery and leadership in defending the kingdom against invading forces.

In the realm of literature, Khai Tharathorn was a respected Thai poet and writer who lived in the early 20th century. His works, which explored themes of love, nature, and spirituality, have left a lasting impact on Thai literature and culture.

Khai Sirithorn, a contemporary Thai actress and model, has also brought attention to the name in recent decades. Born in 1979, she has starred in numerous popular Thai films and television series, becoming a household name in Thailand.

Lastly, Khai Khao San Road is a renowned street in Bangkok, known for its vibrant nightlife, street food, and backpacker culture. The name Khai Khao San Road has become synonymous with the rich cultural diversity and energy of Thailand's capital city.