[yazoo]

“Not uncoincidentally, he loves Mary Poppins too.”

Do you mean “Coincidentally, he love Mary Poppins, too?”

Sorry, couldn’t help myself.

[Flycatcher]

Do you mean “Coincidentally, he love Mary Poppins, too?”

Yes. But that sounds clunky. The double negative phrase "not uncoincidentally" is often used to add a bit of archness to the thought.

Me love grammar. ;)