George and William both settled in the Vesta (Johnson County) NE area.Henry Leck is a new name for me. I haven't found that one in NE yet. I did find some Lecks still living in Broken Bow NE, but haven't had a chance to try to contact them.None of them appear to have e-mail and I'm not the world's best at offline correspondence. Perhaps, though, they're a clue for both of us!
Where in PA is your Henry from, or do you know? I know that George is reportedly born in Armstrong County, but don't know which township. I'm "guessing" that George and William are related based on their write ups in the Andreas' History of Nebraska for Vesta.