Where do these two surnames come from and mean? This is what I have for Adenhart, but it is pure conjecture:
I believe Adenhart is a surname of German origin. I think it comes from the two words "Ade" (which is German "pet form" of the name Adam) and "hart", which means hard.
For Adlesh, I have no idea. I imagine the first part, Ad-, also derives from Adam, but I don't know what the "-lesh" comes from. Could it be of Hebrew origin? I don't know. Your help is greatly appreciated.