According to Lauderdale and Kestenbaum (2000) Top 10 , top 20 and top 50 Vietnamese names are as follow
Top 10 Vietnamese names are
1. Nguyen
2. Tran
3. Le
4. Pham
5. Huynh
6. Vu
7. Phan
8. Truong
9. Hoang
10. Ngo
Top 20 Vietnamese names are

11. Dang
12. Do
13. Bui
14. Vo
15. Ly
16. Duong
17. Luong
18. Dinh
19. Trinh
20. Luu
Top 50 Vietnamese names are
21. Doan
22. Dao
23. Thai
24. Mai
25. Van
26. Cao
27. Vuong
28. Phung
29. Quach
30. Ta
31. Diep
32. Ton
33. La
34. Thach
35. Thi
36. Thanh
37. Dam
38. Vong
39. Trieu
40. Buu
41. Phu
42. Vinh
43. Quang
44. Tieu
45. Hoa
46. Trang
47. Giang
48. Luc
49. Banh
50. Nghiem
These names are compiled by 2 researchers in year 2000. Current name distribution might be a little different.