William Ruddock of Northern Ireland

I am looking for information about WILLIAM RUDDOCK, prior to 1819. He was born about 1777, and lived in Northern Ireland. He had a niece name Elizabeth, living in the Portadown, Northern Ireland area in 1838.She had 7 chilren and was married to the son of ISAAC BELL, about 1819.Her mother remarried a man named THOMAS WALKER from Drummily(?), about 1824.William came to America about 1810 and lived in Northhampton, Massachusetts.He married SOPHRONIA CURTIS and they had a son John C. and a daugther Maragret A.Some time about 1819, he moved to St. Clair County, Illinois.