The Helston Furry Dance is another member of this tune family. They do not, of course, have to be interconnected. An idea so simple(no pun intended) will obviously occur to people anywhere, they dont have to have learnt it from someone else. I dont think Bartok got his ideas from Simple Gifts, for example(though he might have done). Its really just an ornamented run up and down a cchord, the atrting phrase of the Bartok and Simple Gifts. GBDB.After that, the tunes diverge completely.