Brick wall finding birth record for Henry GURNEY (General)

by Rossgee, New Zealand, Monday, November 13, 2017, 22:17 (2567 days ago)

I have returned to Forest of Dean Family history for help.
I still cannot find any reference to a birth for Henry Gurney (with one exception where there is an unsubstantiated link to Dymock.
Gurneys are referenced in Newent, Dymock and Kempley, so it is clearly a place to search.
Can anyone help please? Is it common, likely that a birth is not officially recorded?
I have tried various spellings. The birth year is either 1768 or 69.
Using Findmypast I have used a wildcard for first name and obtained a list of 16 Gurneys but all show death dates but not birth dates, and none have the firstname Henry. Henry is recorded as marrying Phebe Perkins in 1799 in St Mary, Kempley.
How can one identify parents for Henry?
Appreciate any kind assistance from more experienced researchers than me.