My Lamb's have been in Chicago since at least 1848, possibly earlier in Boston. Potato Famine Irish Immigrants. I have no idea were in Ireland they came from. James Lamb was b. 1830 in Ireland. May have immigrated to USA with his parents, names unknown. Kathy Flynn Is right. You do have a goldmine. You are the first Lamb/Lambe in USA I've come across that even knows where in Ireland to look. Congradulations! Where did your Lamb's settle? Did the immigration CD help? Your grandfather and his brothers would have been contempories of Joseph Lamb, James' son. Maybe some relation? Only further research will tell. Keep me posted.