Thank you all for your help in clearing up this mystery.
It looks like Gweneth and Gwyneth are the same person.
Rosie99
Late registration as you say.
Bethanyyd96
I have sent an error correction to FindMyPast.
Cas
Unusual surname but they didn't have much imagination when it came to forenames.
I have 4 named John born in the same quarter 2 with parents with the same names.
Comberton
I made a note of this family. By 1939 there were 5 children.
Thank you all once again