It’s not bigotry. It’s ignorance.
Alan: Could you email [new girl] your style guide, perchance? Her surname is [new girl surname].
Me: got it.
Me: is she related to [other colleague]?
Alan: As far as I’m aware, no. Weird coincidence, though.
Me: indeed
Me: I’ve never heard of the name [other colleague and new girl surname], which is why I ask.
Me: I’m not a bigot.
Alan: Larissa “THEY’RE ALL THE SAME” Gillotti.
Alan: Your secret is safe with me.