I'm writing a function in Python that will allow me to list all folders that have a common root folder (common ancestor), but in the process of building up unordered folder pairs for each folder, I am weeding out all pairs where folder A is a descendant of folder B or vice versa.
In essence, I want to pair each folder with all the other folders except all of its children and all of its parents.
So, what do you call a relative who is neither your descendant nor you his?
More information per request:
This issue appeared in the field of programming, hence the tag, but I welcome a general answer, if one such exists.
A sample sentence demonstrating how the word would be used. Oh boy, this is going to sound contrived.
Julia is my relative, but she is neither my descendant nor I hers. She is my __insert word here__.