I'm just generally wondering what types become tomboys.
It's pretty general to categorize one type although I think you would find a higher percentage of tomboys amongst STP women than some other types. From what I understand of the term it implies a kind of earthiness, directness, physicality, willingness to get your hands dirty, etc. That is something I would tend to associate with some combination of Se and Ti (which INFJs actually have come to think of it).
My personality type could also be stereotyped in the opposite direction, but I have some tomboyishness in my personality as well. This is mostly because I was raised by a single mother, so I'm used to doing whatever needs to be done whether it's gathering/chopping wood, building a fire, figuring out what's wrong with my car, building furniture, etc. I enjoy working on a house as well and could enjoy building a house. It always surprises me when I find out some women avoid these things. I'm not good at (or interested in sports) though. My point is that environment and experience can bring out these qualities as much or moreso than an MBTI category.
The first man to raise a fist is the man who's run out of ideas. H.G. WELLS
The first principle is that you must not fool yourself, and you are the easiest person to fool. FEYNMAN If this is monkey pee, you're on your own.SCULLY