I do always. And I give them names that start with the first letter of what I want them to do. So researchers are Rocky or Randi or Rene and farmers Frank and Francess etc. Healers are most important to name with H names so you can find them in a healing emergency...they often end up being Masters at a different type of job so it's not always easy to find them.

I also agree that when the village starts filling up it's too hard to keep track of that - nor does it matter since you have enough of all kinds of workers that it doesn't matter who does what.