You really ought to find out if it is grafted. If it is and those are root suckers you probably won't end up with your preferred cherry; might not end up with a cherry at all. The graft will look like a scar that goes all the way around the trunk, or a swollen out bulbous area, again around the trunk or possibly on one side (if side grafted).
If you feel it is part of the real cherry tree you can use a rooting hormone (I recommend Dip n' Grow liquid) and give it a try.
Shoe
