It would seem an odd transcription error :-)

... I have seen what appear to be mistakes in the original registers, and the transcription only attempts to list what was in the original, so someone needs to go back to the original source and confirm what was written, it may have been Charlotte in the records !

The transcript is possibly correct. I've seen the mothers name being inserted in
a number of instances where the person was born illegitimate and the father was
unknown (or was being kept secret).

I suspect this is the Mary Ann BALDWIN refered to :-

1881 24 Drybrook Road
Joseph Roberts 26
Mary Ann Roberts 22
George R. Roberts 3
Sidney J. Roberts 1

Name: Mary Anne Baldwin
Name: Joseph Roberts
Year of Registration: 1877
Quarter of Registration: Apr-May-Jun
District: Westbury On Severn
County: Gloucestershire
Volume: 6a
Page: 417

1871 Pludds
Aaron Baldwin 38
Elizabeth Baldwin 37
Aaron Baldwin 6
Albert Baldwin 10
Edith Baldwin 1
Elizabeth Baldwin 13
Mary Ann Baldwin 14

1861 Lydbrook Hill
Aaron Baldwin 28
Elizabeth Baldwin 27
Elizabeth Baldwin 3
Marit Baldwin 1
Mary Ann Baldwin 5
Wm Baldwin 6

1901 Upper Bilson
Cornelius Baldwin 60
Ann Baldwin 60

1891 Heywood, Cinderford
Comeilas Baldwin 50
Ann Baldwin 49
Comeilas Baldwin 21
Edith Baldwin 12
Eleazar Baldwin 16
Muncie Baldwin 9

1881 25 Woodside Rd Cinderford
Cornelius Baldwin 40
Ann Baldwin 39
Cornelius Baldwin 12
Edith Baldwin 2
Eleazor Baldwin 7
Eliza Baldwin 18
Laura Baldwin 9

1871 Morse Rd ( Drybrook / Ruardean)
Cornelius Baldwin 31
Ann Baldwin 30
Cornelius Baldwin 1
Eliza Baldwin 10
Ellen Baldwin 7

1861 East Dean area of Harrow Hill / Drybrook
Cornelius Baldwin 21
Anne Baldwin 22
Anne Baldwin 1
Lucy Baldwin 3

Possible marriage
Name: Ann Meek
Name: Cornelius Baldwin
Year of Registration: 1857
Quarter of Registration: Oct-Nov-Dec
District: Westbury On Severn
County: Gloucestershire
Volume: 6a
Page: 361

not
1861
Edward Baldwin abt 1819 Ruardean, Gloucestershire, England Head East Dean, Gloucestershire
Lydia Baldwin abt 1800 Ruardean, Gloucestershire, England Wife East Dean, Gloucestershire
Cornelius Baldwin abt 1840 Ruardean, Gloucestershire, England Son East Dean, Gloucestershire
Eliza Baldwin abt 1843 Ruardean, Gloucestershire, England Daughter East Dean, Gloucestershire
John Baldwin abt 1851 Ruardean, Gloucestershire, England Son East Dean, Gloucestershire
Louisa Baldwin abt 1856 Ruardean, Gloucestershire, England Daughter East Dean, Gloucestershire

1851 Harry Hill / Drybrook
Moses Baldwin 37
Sarah Baldwin 38
Caroline Baldwin 12
Cornelius Baldwin 14
Elisa Baldwin 11
Emma Baldwin 1
Joseph Baldwin 6
Mary Ann Baldwin 9
Thomas Baldwin 4

1841 Wigpool
Moses Baldwin abt 1815 Gloucestershire, England Dean Forest Gloucestershire
Sarah Baldwin abt 1813 Gloucestershire, England Dean Forest Gloucestershire
Caraline Baldwin abt 1838 Gloucestershire, England Dean Forest Gloucestershire
Cornelius Baldwin abt 1837 Gloucestershire, England Dean Forest Gloucestershire
Eliza Baldwin abt 1840 Gloucestershire, England Dean Forest Gloucestershire

Thank you both for the comments. Slowhands has given me more info to dig into.
The matter becomes even more complicated since there are two Cornelius Baldwins with wives named Ann. Dewey