With a definition of agreement of cohabitation not recognized with a legal or eclesiastical document but resulting in the production of offspring. I ask for this catagory because I personally have this in my own profile and the resulting child was not pleased to see how it looked on my profile not to have his father on it. I see that this question was answered but I feel that it should be addressed again the answer was: there is no way to do it. Why not? Common law can be listed right under husband or wife, and not even the surname would change if coded in... many tree software do recognize common law as such, my home software does...If the answer given was a final decision on the issue I understand and will abide by it . I wanted to make the comment that the answer included the way to "get around" that was to add common law or unmarrieds such as the mistresses listed as wives of Henry the VIII is misleading at the topical glance and from a historically correct point of view. Thank you.