Possibly this is right father. Westmoreland county is next to Fayette county (Fayette was created from Westmoreland County), plus occupation of father and son Joseph are similar.

1850 Census, Sewickley, Westmoreland Co., PA
Kelly, Joseph R., 50, carpenter
Anne, 49
William, 22
Keziah, 18
Sarah Jane, 14
Joseph, 16, carpenter
Hannah, 5