The root description of CouplingAndCohesion, OnceAndOnlyOnce, SeparationOfConcerns, and many others -- for this reason JimWeirich has called it the "Grand Unified Theory of Software Development".

The etymology is, "Born Together".

* ETE 2012 - Jim Weirich - Connascence Examined - http://youtu.be/HQXVKHoUQxY
* A good article that describes the contents of the video: http://blog.rubybestpractices.com/posts/gregory/056-issue-24-connascence.html