Beware: This post contains spoilers for the Game of Thrones Season 6 finale.

Jon Snow really does know nothing — not even his true first name.

At this point, Game of Thrones has all but confirmed Jon is the child of Rhaegar Targaryen and Lyanna Stark, a secret Ned Stark swore to protect at the Tower of Joy. But thanks to a skillful bit of lip-reading, one astute Redditor thinks they also know the name Lyanna originally gave Jon — because she repeated it to Ned right before she died.

“Lyanna starts by whispering ‘His name is,’ and then what follows appears to be a three syllable word that appears to start with a J,” wrote sparkledavisjr. “I’m not a great lip-reader, but I’m fairly certain what she says is ‘Jaehaerys’.”

Thanks for not providing closed captioning, HBO.

So where’d this name come from, anyway? Turns out, it’s the moniker of a past Targaryen king who wasn’t as brutal as Mad King Aerys, and thus a lot more acceptable to name a baby after.

But, since Ned couldn’t cart around a kid with a Targaryen name, he decided to go with “Jon” instead (possibly in honor of his friend Jon Arryn).

Heads up, Jon: you might need to get new business cards made next season.

[H/T: Uproxx]

BONUS: Here’s Varys traveling in real time. Are you satisfied?

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