Answer:
A gentleman whose offspring have successfully produced offspring of their own.
What was the first man made invention that could see through a wall?
Of these everyone has ten, part of two wholes at the arms end. What are they?
What comes with your car, but travels more than your car?
Old Mcdonald had this
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.