McCormack Line in McNairy County, Selmer, TN

I am researching the McCormack line that started in Ireland.
I am a granddaughter of James McCormick Sr. Looking for information on my ancestors. There are at least six or seven generations up to my father Grant W..

The MCCormack name has several variations of spellings. The McCormacks come from Ireland and were known to have very red hair.
The first McCormacks or McCormicks probably settled in Charleston, South Carolina.

James McCormick Sr. married Becky Elliston in Charleston sometime around 1788.

I would appreciate any information on this line and I will share any I have with you. I have just started so I can use all the help I can get. My fathers brothers and sisters all lived in Selmer, TN. in McNairy Co. In some of the research it lists Thomas Lindsey McCormack has only haveing one son, Grant, my father. This is not true. There were eleven children.

The McCormack reunion is held the 2nd Sunday in September at the Eastview Civic center in McNairy Co. in Selmer, TN. It is a potluck dinner and anyone who is related is welcome to come. There are several Prathers since two of the sisters married brothers.

My father was the middle child of 11 children. He lived to be 93 years old.