Question: What is their Sir-name? they call themselves the apple family but their grandma's last name is smith. and their names are Applejack and Applebloom said as one word, so is it Applejack Apple or Applejack smith? we do know with their parents backstory Mrs. cake changed her sir-name upon marriage, same holds true with Spoiled Rich whose maiden name is Milk. There is too many existential questions in this (these?) world.