I had that too. However, ? didn't do too badly, he became an elder and got a totem.

This is my favorite island event so far! I loved that he forgot his name! I named him "Bonked Boy". Now he's grown though and the name really doesn't do him justice.

I had that happen twice to two different villagers. One happened when he was young so he got skills in everything and the other one lost skill .

I had that happen twice. I know the 1st time the boy lost all his skill, but it was ok because he was to little to even have anything.
And the 2nd time he lost his memory and I had to rename him.
But how does anyone let that happen?
I read somewhere where someone let them get bonked on the head on purpose.
How did they do that?

I chose to let my 4yo rest and changed her name to Thumper.