James Gaffney, Ballynakill County Laois

James Gaffney(GGG Grandfather) born 1802 Ballynakill, County Laois son of Patrick Gaffney and Judith Tallon.

My question is the family seemed to move from County Laois to County Wexford.  James Gaffney married Anastasia Dwyer and they had 3 children...Adam(GG Grandfather), Lawrence and Catherine.  

I was wondering if anyone woulld have any records of the family and would be able to explain why the family would move from one County to another?  It looks like where my Great Great Grandfather Adam born 1824, Killegney, County Wexford their seemed to be alot of Gaffney's in the area.  Would that explain whjy they moved??? Any help would be appreciated.