Johnny Cash - Cash Family Mystery

My name is Cindy Tucker. My maiden name is Cindy Brown. My father was Robert Brown. I don't know this side of the family well but I have been told that my fathers Grandma was a Cash related to John and married a Gormley. My father feels my Great Grandma that was a Cash that married a Gormley was either Ray Cash's Sister or Aunt. I have heard from several different family members over the years that Johnny Cash was my cousin 2nd or 3rd maybe. Being I do not know this side of my family well there is really nobody to ask specific questions on this topic. I have looked up family history online but I am unable to find any info. If anyone has any please let me know. I am very musical and it would be neat to know it came from a Cash family line. Ihave a very old picture that was sent to me that I am told are of Cash family members including my Great Grandma and Great Great Grandma. I would love to submit it if it is true that we are related.