If you have baby with a guy that was born with epilepsy is there a good chance the baby will have epilepsy?he has a kid already that has epilepsy...

Yes, but it depends: The risk for developing epilepsy in the general population is about 1-2%. The children of a parent with epilepsy are at higher risk of developing epilepsy but it depends on several factors: age of parent's seizure onset, type of epilepsy syndrome, number of other family members with epilepsy. The range of risk is somewhere between 2% to 10% for most epilepsy syndromes.

Genetic: If he has epilepsy because of a gene he inherited, and already has a child with the same exact kind of epilepsy, then each child he fathers would typically have a 50-50 chance of inheriting that gene...and likely developing epilepsy.

Depends on type: It depends on the type of epilepsy he has. If you get the opportunity, ask to speak with his neurologist what type of epilepsy he has and try to get the information about his child with epilepsy.

Genetic Epilepsy: A man with epilepsy who has a child with epilepsy is far more likely to have another child with epilepsy then one without a personal history of epilepsy. However, even with the same epilepsy gene in the same family, some people will not be affected and others mildly while still others more severely affected. There now are tests for many genetic epilepsies but not for severity.