This looks like the birth?
December qtr 1932
Bedwellty Registration District vol 11a, page 166
Watkins, Terence Mother's maiden name: Stone
And parent's marriage:
December qtr 1925
Bedwellty Registration District vol 11a, page 312
Watkins, William J
Stone, Muriel F
Bedwellty Reg. District includes the parish of Tredegar.
Using FreeBMD, with a surname of Watkins and a Mother's name of Stone, and searching 1925 to 1950 reveals at least 2 brothers (registered in Bedwellty) and possibly a brother and sister registered in Chepstow.
Because they may still be alive, I can't mention them
