Names

So my first from a previous relationship name is chase, well my second son's name is jarrod from the relationship im in now and we are pregnant with our third son and wanting to name him with a j also cause it's a family tradition that his grandpa started with all his son but is it fair to my oldest son that his name won't be a j it's not like we aren't gonna have his last name changed to match the other two boys but I'm getting so much grief from my side of the family I don't know what to do.......