Two Hulberts have an exact match in DNA tests. This result helps confirm the common ancestor, William Hulbert/Hulburd.
There is a mismatch with two Hurlbuts, which indicates there is not a close relationship between Thomas Hurlbut and William.

The Surname Project for Hurlbut/Hulbert has been started to compare DNA results.
Paternal lines are tested by Y-DNA results and maternal lines by mtDNA results.
A support site is at http://hurlbutdna.pbwiki.com/ to explain and collaborate on this project. It is a wiki site that allows users to add, remove, or otherwise edit and change all content. All are encouraged to check it out and join in.