John Brown Robertson & family 1880-1900 Ohio

[Jimfred]

I'm looking for more information on John Brown Robertson b: abt 1851 and his wife Margaret Johnston b: abt 1855. Both were born in Scotland. They were married at Cruden in 1877 had one daughter Margaret b: 1879 and shortly afterwards emigrated to the U.S. Other children I know of : Blanche b: 1884, Walter b: 1887 & John Brown b: 1890 all born in the U.S. at least one and possibly all of them born in Ohio. There were other children born in the U.S. but John Brown Sr. & Margaret died some time in the 1890's. Their children: Margaret, Blanche, Walter & John Brown Jr. were sent back to Cruden to live with relatives. The other children (don't know their names) were left to be raised in the U.S.
Does anyone have information on this family that were split up because of the death of their parents? Thanks,  Jim