They say 7 generations, and they aren’t counting generations as Gen X and Gen Y, they seem to be counting them as mother to child. So, there is a 13 year old that had a child, and a 15 year old holding her 1 month old.

Here is the best I could do with something that is remotely trustworthy as a source: guinnessworldrecords.com/…/most-living-generation…

Guinness confirms the lineage.