I've looked at a number of deeds and tax lists for Philadelphia & surrounds in the late 1600s but none of those I was looking for was under 21. Most were men who received grants of land from the Crown or Penn or whomever was selling it and were men with families, so well over 21. Under English law you would have to be 21 - you would think it would have been the same. Most were probably first generation immigrants pre-1700, too, so inheritance wasn't in play yet - even then, there would be some sort of guardian for a minor. Liane