There is a new MacLennan Y-DNA surname Project at FTDNA. So far, they have one test subject, and he is not even close to matching our McClendon/McLendon Y-DNA:
We will keep watching this project, but we do not expect to see any matches.
For now, our Y-DNA test results show that we McClendons are our own distinct clan. We are not descended from any MacLennans/McLennans/McClennans.
If our McClendons/McLendons turn up matching large numbers of very well documented MacLennan/McLennan/McClennan test subjects, we will revisit this question.
Mary Lee (McClendon) Becker
McClendon DNA Project