Hi, I have LANG/LAING's in my tree, but mine are Robert LANG & Elizibeth MITCHELL??, Only one son known Archibald c.1755. I have all just about given up finding siblings for Archibald, which is strange for that time frame of him being the only child.
My lot also came from Larbert, you havent come across this family any where in your family history research??.
Regards Leanne