Lana Wachowski (Slate)

The Wachowski brothers are now the Wachowski sisters.

The directing duo, known for 1999’s “The Matrix” and 2015’s “Jupiter Ascending, have each gone through their own transitions to become transwomen. Lana (formerly known as Larry) began her transition in 2012, and Lilly (formerly known as Andy) was recently reported to have been transitioning.

This high-profile occurrence begs the question: How common are transgender siblings?

I wasn’t able to find any hard data on this. My guess is that it’s pretty rare, so there probably haven’t been any studies devoted to it. There are some numbers around twins transitioning (both identical and fraternal pairs), but that wouldn’t apply to the Wachowskis. But when and/or if the scientific community gets around to studying this phenomenon, I’ll be curious to see the numbers.