A bit of literary juxtaposition that just ocurred to me while feeling the urge to write about anything:
Consider, if you will (I just did) the similarities between Yakko, Wakko and Dot, on the one hand, and Orddu, Orwen and Orgoch, respectively, on the other.
They all have similar-sounding names within their groups, and their groups consist of three individuals. Yakko and Orddu do most of the talking for the others; Orwen and Dot not only echo or comment on what's been said, but like cute things. Wakko and Orgoch like to eat things. The three enchantresses of the Marshes of Morva possess vast powers mere mortals can only guess at, while the Warner Brothers (and the Warner Sister) are cartoon characters who regard the laws of physics and cause-and-effect as optional.
I'm not suggesting the animators and writers at Warner Bros. found any conscious inspiration from Lloyd Alexander's books. I'm sure it's just a coincidence. The evidence of my nerdiness piles up, however.