W. Audrey was a railroad buff and Anglican priest, who liked to vacation of the Isle of Man, which he knew was part of the Anglican diocese of Man and Sodor. Sodor was previously the Norwegian diocese of “Sodor”, meaning southern islands, e.g., the Shetlands, which passed from Norwegian to English eccliastical control around 1100.
Audrey wrote the railway series of books, but Thomas doesn’t show up until the fifth or sixth book. And yes, I have grandkids. Is your three year old a girl, because I think Thomas and Friends is a guy thing.