DNA

I was wondering if there is DNA testing for the Husbands families?My Grandfather changed his name to Harris in 1926 but he could not change his DNA. I have a brother with the Harris surname but Husbands DNA. I am begenning to think that this is the only way my family may get past this brick wall.If there is any DNA sites for this surname would someone please e-mail me and let me know what we have to do.Thank you, Sue Harris McDonald