Facebook Reveals How Common It Is For Siblings to Have The Same First Initial

“For years, parents have been naming their children in clever, or, if you feel less charitable, ‘clever’ way,” Facebook snakily retorts in a blog post that tracks the unconventional decisions parents make when naming their children.

Facebook data scientists compared users listed as siblings with randomly generated pairs (of their respective name) to find out the most common sibling names. And the 10 most common pairs, when compared to chance, were:

Where’s Kourtney, Kim, and Khloe?

Furthermore, siblings have an 11% chance of having the same first initial — compared to 7% of randoms.

According to Facebook, “the late-teens drop is due to a cultural phenomenon where best friends of that age will often list each other as siblings.”

And chances of having the same first initial goes up considerably when the siblings are twins: