@EdgeOErin You've already created a legacy that honors him in the kindness of your heart, and the creativity that you've shared with the world.
Any father would be proud to have such a son, and as you continue, that legacy will only grow until it's your time to cross the far horizon.
One does not need children to be remembered, and you are certain to not be forgotten. Though I hope it's many years before we have to worry about such.