I'm not sure about the answer to this. I think my Great Great Grandmother, Martha Ellen Gray, who married William Elmer Blue, had something like fifteen brothers and sisters. I do descend from two families of Parkers that were twelve each. great Great Grandfather Peter James Parker MD was tenth of twelve children, and his Father, Reverend Peter Parker was, I believe sixth of another twelve children. I was happy to find that some distant cousin had already put that mid nineteenth century generation of Parkers on Wikitree.