So, something was itching at me about the name “Anthony Brian Williams,” and then last night it hit me.
Anthony as in Tony.
Tony as in Jackie Tyler’s son. (“No, you plum- he’s called Tony.” Journey’s End.)
So then I looked at the numbers- Anthony would have been 21 at the time Jackie was born, a year older than she was when Rose was born. And given his parents’ history, it’s reasonable he might want Jackie to have her mother’s last name. He’s in Leadworth in P.S.- maybe he lived in Britain.
Jackie named her son after her father.
Which means that Amy is Rose’s great-grandmother.