Yes, according to the reference, Ben 10 does have children.
Ben 10's Children
Based on the provided reference, Ben Tennyson marries Kai Green and they have two children:
| Child's Name | Gender |
|---|---|
| Kenny Tennyson | Male |
| Gwendolyn Tennyson | Female |
The reference also states that in preparation for Kenny's 10th birthday, Ben uses his smartest aliens to create a replica Omnitrix for his son.
In summary, Ben 10, also known as Ben Tennyson, has two children with Kai Green: a son named Kenny Tennyson and a daughter named Gwendolyn Tennyson.
