I need tattoo ideas, in memory of grandpas.?

I want to get tattoo's in memory of my two grandpas that have ped away. My mothers side, he was a construction worker his whole life, hard worker, and a great guy. My dads side, he worked as a machinist his entire life, lived on a farm, basically raised me for a good part of my life, i want something i can get to honor them, Their names were Richard Williams and David Engstrom(also my name) i was looking to put it on my left arm deltoid, maybe even both arms if it was big enough. I need ideas of what to get im drawing a blank, if you are a tattoo artist and come up with something good i would definately pay you for the sketch. thank you.