Updated on 17 June 2013
"To add to this research, it is important to note that the other related branches of R3ob, this is R3oa and R3o, are also entirely South Asian in origin. This confirms beyond doubt that the mtDNA of Eliza Newark was of Indian heritage," BritainsDNA said in a statement on its website.
Since mtDNA is only passed from mother to child, it's likely that William carries a portion of Kewark's mtDNA.
"This was independent evidence that there was Indian ancestry. For me, it corroborated the findings from the mtDNA. We've got two different kinds of genetic evidence that are independent from one another and they both corroborate the story. So it really seems that our future king has a little bit of Indian blood," Dr Wilson added.