I recently discovered that the term is still in use. The Smithsonian magazine http://www.smithsonianmag.com/travel/bermuda-history-and-heritage-14340790/ references the term as used in Bermuda  “‘Aunt Haggie’s children'(slow or confounding people).”  See my July 2012 post defining the term.

And now this election cycle has revealed a new group of Aunt Haggie’s children: Black Trump supporters. http://www.theroot.com/articles/politics/2016/08/donald-trumps-factory-of-ignorant-black-surrogates/