There is a birth entry in Dartford, Kent, for a Pamela Hilden (mother's maiden name also Hilden) in 1st Qrt 1939 (ref 2a/ 1228).
There are earlier births in Dartford through the 1930s for Wright children, with mother's maiden maiden name showing as Hilden.
Can't see a marriage for Hilden and Wright though...
Also, the 1939 register has a couple, William and Emily Hilden. Her maiden name is also Hilden. There are 2 redacted entries for children and one for son William b. 1926 (one possible birth in 1926 for a William/Billy Hilden, with mother's maiden name Hilden, in Eastry, Kent).
There are lots of Hilden/Hilden births so hard to know which other births are connected. Emily Hilden's age/birth year would fit with what you have. Was her death registered as Wright?
Monica