The Concubine's Children was created in 1994.
Bilhah and Zilpah were concubines of Jacob, not his wives. They were given to Jacob by his wives Leah and Rachel to bear children on their behalf.
The King of Siam.
Rehoboam was the King of Judah who took eighteen wives and sixty concubines. He fathered twenty-eight sons and sixty daughters, for a total of 88 children.
Rehoboam. 2 Chronicles 11:21 And Rehoboam loved Maachah the daughter of Absalom above all his wives and his concubines: (for he took eighteen wives, and threescore concubines; and begat twenty and eight sons, and threescore daughters.)
The honor goes to King Solomon; if the biblical record is to be believed, he had 700 wives and 300 concubines.
Yes in those days it was common for kings to have concubines, David had a few but Solomon had it in hundreds.
Qui Shi Huang had so many kids because he lived in a time when it was acceptable to have concubines. He had an estimated 50 children.
I don't think they were named in the Bible and Absalom did not seem to know them, the way he blatantly took his father's concubines. (2Samuel 16.22)
Officially no.
My calculations come up with 25 legitimate children and unknown others conceived with concubines. It is hard to distinguish male names from female names, but Solomon was number 25 of 25 legitimate children.
Children Children was created in 1978.
Children for Children was created in 1996.