interjection
golly
GAH-lee/ˈɡɑːli/
A mild expression of surprise or emphasis.
Golly, that pumpkin is much bigger than I expected!

Etymology
Golly substitutes for God in an oath or emphatic exclamation. This softened invocation conveys surprise or emphasis without directly using the divine name.
In context
Were those children in the Chowchilla kidnapping? By golly, they were there. And everybody knows the names of those kids and everybody knows that they were there.