Social Services, Child Services, Social Worker, DCYF agent, batman, pick one...
because they are the result of the love of their parents..
They are called children of unmarried parents.
That is called incest and is illegal.
Because the child's parents parents are called grandparents.
Progeny
Families.
"Mixed" or "Biracial"
because your parents called you Emma
Pluto isn't a planet anymore because it was to small to be considered a planet.
The first generation of offspring from the cross of two parents is called the _____.
Sad
because that is what your parents called you by birth