Alan Ellis
From Tardis Wiki, the free Doctor Who reference
Alan Ellis was the son of John Ellis. In 1953, he was devastated when his father disappeared, having been torn through the Rift. He married and had children, all of whom died. He began to suffer Alzheimer's disease and was admitted to hospital. In 2007, John returned to him and he remembered some snippets of his childhood, but did not recognise who John was. (TW: Out of Time)