> "Da Vinci" as in "The Da Vinci Code"

I seem to recall him being referred to primarily as "da Vinci" in my childhood, long before that book was ever written.

> for anyone who traffics in Leonardo.

Interesting. That choice of phrasing makes "Leonardo" sound, to me, like a constructed shibboleth intended to gatekeep those who aren't "in the know". That's probably a slightly uncharitable take (sorry) but it was the first implication that just slapped me in the face.

> In art historic circles he is simply, as he started out in this world, Leonardo.

I wasn't aware that Ars Technica was aiming at the art historic circle crowd. ;-)