My grandmother (living) was a Markus. Her father was Willie Neal Markus, Sr., b. 9/6/1897 in Lawrence Co. TN. His father was John Markus, b. 1/16/1877 in Lawrence Co. TN. I have been told that John's father or possibly his grandfather changed the spelling of the family name when they arrived in the US to avoid confusion. Does anyone have any information about this ?