Heredity is seen minimal with epilepsy.  Lets take the general population. “The general population has about a 1% risk of developing epilepsy.  Meanwhile, children of mothers with epilepsy have a 3 to 9% risk of inheriting this disease, while children of fathers have a 1.5 to 3% risk of inheritence.” Based on genes research

Dr. Robert S. Fischer Ph D. Stanford Epilepsy Center http://neurology.stanford.edu/epilepsy/patientcare/videos