(some of these creatures must use magic to assume a form that is compatible with a Human mate, of course). Fiend-touched and similarly tainted mixes of Elves (notably the Fey'ri), orcs (such as the Tanarukk), and other races are known, but those are distinct lines and not true ...
Ditto for Hobgoblins; 2e has moved Pathfinder's hobs away from being faux-samurai, and they're products of strange alchemy rather than 5e's goblinoids being fey. Fey goblins is itself a bloody retcon that doesn't fit in with any of the pre-established lore from even the beginning of ...