20She Was Raised By A Cow
That's right, in the comics, Scarlet Witch was actually raised by a cow. When Pietro and Wanda's mother, Magda, was on the run from Magento, she brought them to a small village in the mountains where a bunch of humans who evolved from modern-day animals lived.
To be fair, these creatures
didn't just do this on their own. A character called The High Evolutionary was experimenting on them in order to create a new race.
He did manage to make Bova, the cow who ended up taking care of the two twin babies after their mother abandoned them. Eventually, the Maximoff family adopted them, but they did spend some of their earliest memories under the loving care of a human-sized, talking cow. No wonder the MCU changed their backstory.