Three additional individuals, one with epilepsy with myoclonic‐atonic seizures and two with generalized and focal epilepsy without febrile seizures, were included after reviewing an institutional database of epilepsy gene panel results, for a final cohort of 12 individuals with epilepsy and heterozygous exonic SCN1A variants including three truncating variants (Tables 1 and 2). The gene discussed is SCN1A; the disease is Atonic seizure.