How old are you, by the way? If by children you mean your future children, I guess they will encounter Bitcoin first before Satoshi. And for sure they will first bump into the word outside the dictionary. Most probably they won't even need the dictionary to know what Bitcoin or Satoshi is. The unborn and little children of today will certainly meet Bitcoin first not in the dictionary but in the outside world, and as a money, in their favorite ice cream shop, in the arcade, and so on. This Oxford English Dictionary listing will just be a piece of history for them.