FAMILIES ARE AMAZING INSTITUTIONS. Some people can trace their “tree” back centuries into the shadowy mists of time while others seem to have popped up with the most recent rainfall. I think it all depends on how much research you want to do and how much fertilizer you are willing to spread.
Today’s world is one where our lives are very fluidic. People move from one place to another as easily as a mountain stream. Town to Town, City to City, Continent to Continent. Immigration and Emigration are words we hear every day.