Hi Ben,
Yes I did this, when I very first started researching my family history. I bought twin cabbage patch dolls with red hair for my Granddaughter and because she loved researching our tree, she wanted to call them after a set of twins in our tree.
We went back and looked at all the cases of twins, picked the prettiest, named the dolls and then started to look at who their family members were and what jobs they did. We ended up writing a childrens story together, which looked at the issues of children in the mines and common diseases of the time, which shortened children's lives. It was great fun for both of us and we learnt such a lot. Imagine our delight months later when we made contact with other family members around the world and found out that this family, was actually a family of red heads!
Jill