Cyril Lewis's birth certificate came today and it mentions he was born at Prince Street, Netherton, Dudley. As I suspected, it shows his father's section to be blank. It also mentions his mother Lily's occupation was domestic servant. As there's no details on his father, it makes me wonder where Cyril's middle name Dyson came from, unless it was Lily's mother's maiden name.
As I mentioned in an earlier post, when Lily and Cyril were living in Wolverhampton in 1939, there was a Frank Lewis who lived down the road who appears to have been unrelated as I traced his family and found they originated from Willenhall (for members who don't know the Black Country Willenhall is between Wolverhampton and Walsall) and they were lock makers like so many people in Willenhall.
I wonder if Cyril might have known Frank and that could possibly have been why he used the name Frank for his imaginary father on the marriage certificate. I was also thinking as Lily was a domestic servant, could the father have been her employer as I know this did happen