Well - traditionally little boys wore frocks.

I know my sister had three fits when she saw that I did not try to stuff my baby boys into those dreadful little suits with popper closures, but I also know who was washing nappies the longest.

The serious reenactors put their young sons in frocks and even make an occasion of the first breeching.

So if you are going to be dead traditional a little boy would wear a female garment, but you might also have to live with him when he's a hand's breadth taller and a quarter second faster than you are.