Hello
I have PA connections with my McKenna family.
Do you know your grandfather's wife's maiden name??
There are a couple of possibilities in PA in 1930.
I have full access to ancestry.com and would gladly look things up for you.
Do you know his middle name or his mother's name? There are about 25 possibilities in 1920 census near Pittsburgh.
My PA McKenna's come through the mother so their names are not McKenna, but I believe there were "McKenna" cousins there, as well.
Let me know if I can help. sarah.broadbent1@gmail.com