1. Pham Cao Nguyen and Pham Cong Minh

At the 2024 International Olympiad of Informatics (IOI) held in Egypt, Pham Cong Minh, a 12th grader at the Hanoi High School for the Gifted in Natural Sciences, a member school of the Vietnam National University, Hanoi, was one of two Vietnamese gold medal winners.

Prior to that, his elder brother Pham Cao Nguyen, from the same high school, won two medals at 2016 and 2017 IOI.

The 2016 IOI was organized in Russia, and Nguyen, who was then an 11th grader, became one of two Vietnamese gold medal winners.

At 2017 IOI held in Iran one year later, Nguyen won a bronze medal. He is now a postgraduate student in Switzerland.

2. Ho Duc Viet and Ho Duc Trung

Ho Duc Trung, a 12th grader at Quoc Hoc in Hue, won a silver medal for the Vietnamese national team at the 2024 International Biology Olympiad (IBO) in Kazakhstan.

Four years ago, his elder brother Ho Viet Duc from the same high school won a gold medal at the 2020 IBO.

Prior to that, both Duc and Trung ranked first at the entrance exams to the biology major classes of the high school for the gifted. Now Duc is studying at the Hong Kong University of Science and Technology.

3. Nguyen Thuan Hung and Nguyen An Thinh

Both of them were students at the Tran Phu High School for the Gifted in Hai Phong.

They became the first brothers in Vietnam winning gold medals in the 50-year history of Vietnam attending the International Mathematics Olympiad (IMO).

At the 2023 IMO in Japan, Thinh, who was then an informatics major student at Tran Phu High School for the Gifted, won one of two golds for Vietnam.

Prior to that, Hung won a gold at the 2019 IMO in the UK.

Though they have different personalities, the two brothers are good at mathematics, especially in combinatorics and geometry.

4. Vu Ngoc Minh and Vu Hong Anh

Minh was a student at the High School for the Gifted under the Hanoi University of Education. He twice won golds at IMOs.

At the 2001 IMO, Minh, who was then an 11th grader, was the only member of the Vietnamese national team winning a gold. 

He once again won a gold one year later at the 2002 IMO in the UK (Vietnam won 3 golds at the competition) and became one of only a few students winning two golds at two IMOs. 

His younger brother, Vu Hong Anh, who was a student at the Tran Phu High School for the Gifted in Hai Phong, attended the 2009 International Physics Olympiad (IPhO) and won a silver.

5. Pham Anh Tuan and Pham Duc Anh

They are from Hanoi. Anh became one of three gold medalists at the 2017 International Chemistry Olympiad (IChO) in Thailand, ranked 21st out of total 279 competitors from 76 countries and territories. Anh graduated from the Hanoi University of Medicine.

Anh’s elder brother Pham Anh Tuan, got a bronze medal at the 2008 IChO in Hungary. 

This was the first family in Vietnam where two brothers won medals at IChOs.

6. Nguyen The Trung and Nguyen Trung Tu

They are from Hai Phong City. Both were students at the Hanoi High School for the Gifted in Natural Sciences and won silvers at IMOs.

Trung won a silver in 1995, when the IMO was organized in Canada. Four years later, his younger brother Nguyen Trung Tu won another silver at 1999 IMO in Romania.

Another member of the family, the younger brother of their mother, or maternal uncle, Le Nhu Duong, attended the 1978 IMO in Romania where he won a bronze medal.

7. Cao Vu Dan and Cao Vu Nhan

Hai Phong is the home of many Vietnamese talents, including Cao Vu Dan and Cao Vu Nhan. They were both students at the Hanoi High School for the Gifted in Natural Sciences.

Dan won a silver at the 2000 IMO in South Korea, while Nhan won a gold three years later at the 2023 Asian Physics Olympiad (APhO) held in Thailand.

8. Pham Tran Quan and Pham Tran Duc

Quan, born in 1981 and Duc in 1985, are Hanoians and were once students at the High School for the Gifted for Natural Sciences, the ‘cradle’ of many talents.

Quan won an IMO silver in 1999 in Romania, while Duc won a bronze medal at 2003 IOI organized in the US four years later.

9. Ha Huy Minh and Ha Huy Tai

Both Ha Huy Minh and Ha Huy Tai were IMO medalists. Minh won a bronze medal at the 1989 IMO, while Tai won a silver at the 1991 IMO in Sweden.

Thanh Hung