Interesting, note the top figure, the head appears to have a pointed cone shape above its head or was that the true shape of its head? Either its some hat or the head was that way at birth OR like some tribes purposely formed that way as a status the way some tribal women stretch their necks with layers of rings, etc.
It even looks like they may have been conjoined at the head to me. If so, I would suspect that IF they were born alive it's highly likely that they were believed to be a bad/evil omen or some such.
Very interesting.