My gg grandfather, William Clay Bell, was born in Washington Co., PA on January 22, 1812. William married in Pittsburgh.
His father, Walter Bell, was born in Northern Ireland, Monaghan County, on July 24, 1775.
Walter Bell's father, William Bell was born in Monaghan County, Ireland in 1747. William Bell and his wife, Ann Williams relocated to Mercer County, PA wth their children in 1792.
Do you think this might connect with your Northern Ireland Bells who moved to Western PA?