He Jun-dong et al. (2012) found that the mtDNA haplogroup profile for a sample of 139 Kinh was as follows: twenty-four (17.27%) belonged to B4, nineteen (13.67%) belonged to B5, one (0.72%) belonged to B6, four (2.88%) belonged to D, twenty-nine (20.86%) belonged to F, one (0.72%) belonged to G, seven (5.04%) belonged to M*, twenty-one (15.11%) belonged to M7, twelve (8.63%) belonged to M8, four (2.88%) belonged to M9a'b, one (0.72%) belonged to M10, two (1.44%) belonged to M12, one (0.72%) belonged to N*, two (1.44%) belonged to N9a, ten (7.19%) belonged to R9 and one (0.72%) belonged to W4.