A great great great great great grandmother or an ancestor It is often listed as the 5th great grandmother.
You and your great-great-great-great-grandfather's great-great-great nephew are fourth cousins, twice removed.
none of your great grandmas business
Fourth Cousins, twice removed
If there were no cousin marriages in his ancestry, George Washington had 256 great great great great great great great grandfathers. It is likely that no one knows who most of them were.