Please correct me if I’m wrong. Rav Akiva Eiger was the Chasam Sofer’s second wife’s father. The CS may have had children from his first wife who are therefore not RAE einiklach.
You are correct that Reb Akiva Eiger’s daughter was the Chasam Sofer’s second wife. But from what I understand, the first wife died childless. He had 10 children from the second marriage.