I noticed it just today... In one of my games "Unagi" was having trouble learning to build or heal, I would keep putting her at the task and she'll do it for a while, but when I came back later, no further progress. (This is in a finished game where I train all of the villagers to adept level in farming, building and healing, and then the women in breeding, and then let them do what they want to do...)

Anyway, since she was a problem villager, I've been keeping a closer eye on her. This morning, when I checked her progress, I saw that her name was now "Tonga" like the next villager down the line from her.