Answer:
A gentleman whose offspring have successfully produced offspring of their own.
Two year-old children who throw tantrums get this nickname. So did the tsar "Ivan."
What instrument plays from the heart?
Casper was a friendly one and Demi Moore made a clay pot with one.
Humans have two that shrink in the light and expand in the dark
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?