Did Christ have children? No. But, unfortunately, these blasphemies are stories that sell, like Dan Brown’s fiction novel, The DaVinci Code.
Did Jesus have Children?
The Bible tells us what happens when somebody from Heaven mingles with somebody from Earth: giants are born.
The Book of Genesis describes the state of humanity before The Flood:
Now it came to pass, when men began to multiply on the face of the earth, and daughters were born to them, that the sons of God saw the daughters of men, that they were beautiful; and they took wives for themselves of all whom they chose.
And the Lord said, “My Spirit shall not strive with man forever, for he is indeed flesh; yet his days shall be one hundred and twenty years.” There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore children to them. Those were the mighty men who were of old, men of renown.
(Genesis 6:1-4)
How do we know that the sons of God is an expression used to talk about angels, not regular human beings that used to serve God? Because that same expression, sons of God, is used in The Book of Job, when the creation of the world in the presence of the angels is described:
Where were you when I laid the foundations of the earth? Tell Me, if you have understanding. Who determined its measurements? Surely you know! Or who stretched the line upon it? To what were its foundations fastened? Or who laid its cornerstone, when the morning stars sang together, and all the sons of God shouted for joy?
(Job 38:4-7)
Besides, Adam and Eve have received the command to multiply. There is nothing bad in the fact that people get married and multiply, the bad part from that quoted passage from Genesis Chapter 6 is that the angels mated with humans and giants were born and that is one of the reasons for The Flood. People received the command to multiply:
Then God blessed them, and God said to them, “Be fruitful and multiply; fill the earth and subdue it.”
(Genesis 1:28)
Human parents have human children, not Giants (from Genesis)
There is a theory which claims that sons of God are not the angels, but people who used to serve God, more specific the children of Set, brother of Cain. Their argument is that angels cannot mate. But these angels have left their abode:
And the angels who did not keep their proper domain, but left their own abode, He has reserved in everlasting chains under darkness for the judgment of the great day.
(Jude 1:6)

Did that verse refer to the Devil’s minions, which have rebelled against God? No. (More about Lucifer’s fall, HERE.) Those angels who have rebelled are free, unfortunately, not in chains, they live above us:
For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places.
(Ephesians 6:12)
If those spiritual hosts of wickedness are in chains, we wouldn’t have to wrestle against them and our Christian lives would be so much easier. But they are free for now.
How could the Son of God, Jesus Christ, judge those angels which took wives from Earth if He Himself has had children? You cannot judge someone if you have done the same.
For the Father judges no one, but has committed all judgment to the Son.
(John 5:22)
From these, we can say that the angels still have free will even after Lucifer’s rebellion because they took wives of their own, they are not compelled to follow God. But if they do not follow God, they will be judged. How do we know that the angels can walk among us? Chapter 19 from Genesis describes an episode in which the angels that walked among us, but did not leave their own abode:
Now the two angels came to Sodom in the evening, and Lot was sitting in the gate of Sodom. […] But he insisted strongly; so they turned in to him and entered his house. […] Now before they lay down, the men of the city, the men of Sodom, both old and young, all the people from every quarter, surrounded the house.
And they called to Lot and said to him, “Where are the men who came to you tonight? Bring them out to us that we may know them carnally.” […] And they struck the men who were at the doorway of the house with blindness.
(Genesis 19:1, 3-5, 11)
The story of the angels who have helped Lot ended well they’ve kept their abode. We cannot say the same about the sodomites. But we know that, unfortunately, after the Flood, there was another forbidden incursion into our world because Goliath was a giant. A boy called David (he wasn’t a king yet) killed him with a slingshot.
And a champion went out from the camp of the Philistines, named Goliath, from Gath, whose height was six cubits and a span. […] Then David put his hand in his bag and took out a stone; and he slung it and struck the Philistine in his forehead, so that the stone sank into his forehead, and he fell on his face to the earth.
(1 Samuel 17:4,49)
The Giants were always a violent species and always chose the path of war. It’s just like The Book of Genesis say, those were the mighty men who were of old, men of renown. Goliath was no exception, he was a warrior, he was not renowned because he was good at playing the harp. David, on the other hand, used to play the harp and composed psalms.
Is there another argument that Christ did not have children a wife?
Another strong argument is the Apostle Paul’s celibate life. He did not have a wife or any children and he wanted to see all the Christians like him, but that was just a wish, not something compulsory for the Christians:
But I say to the unmarried and to the widows: It is good for them if they remain even as I am.
(1 Corinthians 7:8)
How does that have anything to do with Christ not having children? Well, none of the Apostles had the audacity to say what the Apostle Paul has said:
Imitate me, just as I also imitate Christ.
(1 Corinthians 11:1)
And God allowed that verse to become Scriptures because it was true what Paul had said.
And let us not forget that Paul personally knew the people who were with Jesus Christ for three years. If Christ had children (and we know about Paul that he didn’t), those people who knew Christ firsthand would have said: Paul, you need to have children in order to write such a bold statement. Because he did tell them that it is easier for them to be apostles:
My defense to those who examine me is this: […] Do we have no right to take along a believing wife, as do also the other apostles, the brothers of the Lord, and Cephas? Or is it only Barnabas and I who have no right to refrain from working?
(1 Corinthians 9:3,5-6)
Another argument is the first chapter from the Book of Matthew, in which we can read the genealogy of Jesus Christ: Abraham begot Isaac, Isaac begot Jacob, Jacob begot Judah and his brothers…
Matthan, and Matthan begot Jacob. And Jacob begot Joseph the husband of Mary, of whom was born Jesus who is called Christ.
(Matthew 1:15-16)
The chapter does not continue with: “Jesus begot…”, instead it talks about the fact the Joseph accepted to be the adoptive parent of the Son of God:
Now the birth of Jesus Christ was as follows: After His mother Mary was betrothed to Joseph, before they came together, she was found with child of the Holy Spirit.
Then Joseph her husband, being a just man, and not wanting to make her a public example, was minded to put her away secretly. But while he thought about these things, behold, an angel of the Lord appeared to him in a dream, saying, “Joseph, son of David, do not be afraid to take to you Mary your wife, for that which is conceived in her is of the Holy Spirit.”
(Matthew 1:18-22)
Christ was also called ‘Son of David’ in the Scriptures
But he cried out all the more, “Son of David, have mercy on me!”
(Luke 18:39)
And the Son of David did not come into this world to be the father of giants, but to do His Father’s will, and He always did that:
And this is the will of Him who sent Me, that everyone who sees the Son and believes in Him may have everlasting life; and I will raise him up at the last day.
(John 6:40)
I can of Myself do nothing. As I hear, I judge; and My judgment is righteous, because I do not seek My own will but the will of the Father who sent Me.
(John 5:30)
So the will of His Father was that the world may see His Son and believe, to have everlasting life. There is nothing biblical that indicates that the will of The Father for His Son was to have a wife and children. It was all about conquering sin and death.