Explore the Family Name Thach

Possible origins of the surname Thach

Your DNA provides clues about where your recent ancestors may have lived. Having many distant relatives in the same location suggests that you may all share common ancestry there. Locations with many distant relatives can also be places where people have migrated recently, such as large cities. If a large number of individuals who share your surname have distant relatives in a specific area, it could indicate a connection between your surname and that location, stemming from either recent ancestral ties or migration.

Based on 23andMe data, people with last name Thach have recent ancestry locations spanning a few countries, mostly in Vietnam, and Cambodia.

What Thach haplogroups can tell you

Haplogroups are genetic population groups that share a common ancestor on either your paternal or maternal line. These paternal and maternal haplogroups shed light on your genetic ancestry and help tell the story of your family.

The top paternal haplogroup of people with the surname Thach is O-Z23667, which is predominantly found among people with East Asian & Indigenous American ancestry. Haplogroup O-Z23667 is descended from haplogroup O-M1359. Other common haplogroups include O-F8 and R-P311, which are predominantly found among people with East Asian & Indigenous American and European ancestry. Other surnames with similar common haplogroups are: Sam, Dang, Ngo, So, Lum, Uy, Ly, Phan, Tran, Huynh.

The most common maternal haplogroups of people with Thach surname are: M, F1a1, R. These most commonly trace back to individuals of East Asian & Indigenous American and European ancestry.

Your paternal lineage may be linked to many Indian ethnic groups

Haplogroup O1b1a1a is thought to have arisen in India, roughly 25,000 to 40,000 years ago, and is present in many Indian ethnic groups today. The Indian subcontinent holds four major language groups, called Austro-Asiatic, Dravidian, Indo-European, and Tibeto-Burman. Haplogroup O-M95 likely originated in Indian Austro-Asiatic populations. Its early members carried both the O1-M95 haplogroup and Austro-Asiatic languages further into Southeast Asia through the Northeast Indian corridor. Current research suggests migrating members of O-M95 left eastern India traveling east, through Myanmar, southern China, Vietnam, Laos, Cambodia, and Thailand, and ended in the Andaman and Nicobar Islands. One study found that 100% of a Nicobar Island population belonged to haplogroup O-M95.

Your maternal lineage may be linked to the ancient people of the Indian subcontinent

While Haplogroup M is widespread throughout South and East Asia, it is more diverse on the Indian sub-continent than anywhere else in the world. The high degree of diversity of M in India is likely tied to its ancient arrival here nearly 50,000 years ago. In addition to M2, which is found throughout the subcontinent, there are dozens of haplogroups branching off of M that exist in India. These branches are often connected to specific regions, tribes, or ethnic groups. For example, haplogroup M18 is found among the Oraon peoples of eastern India and Bangladesh, while haplogroup M41 is common among the Pardhan speakers of eastern India, and haplogroup M31a can be found on the Andaman Islands, just off the southeast coast of India.