Any beholders, mind flayers, carrion crawlers, etc. in DDC?

[Geoffrey]

Since the time that a number of classic D&D monsters (beholder, carrion crawler, displacer beast, githyanki, githzerai, mind flayer/illithid, umber hulk, and yuan-ti) were defined as Product Identity by WotC, have any of these monsters ever appeared in Dungeon Crawl Classics modules? If so, how? Were the monsters re-named, or were their names just tweaked a bit, or something else entirely, etc?

[Harley Stroh]

We wrote up snake men for DCC World, and yuan-ti were licensed for use in The Emerald Cobra. Otherwise there haven't been any derivatives from non-OGL material.

//Harley