Working backwards:
1901: Lower Rickeston Mill, Robeston West, Haverford West, Pembrokeshore
RG13 / Piece: 5128 / Folio: 142 / Page: 11
Head: Tobias CODD 43, Corn Miller, b Rickeston
Wife: Jane CODD 53, b Walton West
Son: James CODD 20, unm, Corn Miller Assistant, b -----? Rickeston
Dau: Hannah CODD 14, b Lower?? Rickeston
1891:Broad Haven, Robeston West, Milford, Pembrokeshore
RG12 / Piece: 4534 / Folio 111 / Page 4
Head: Tobias CODD 32, Miller
Wife: Mary CODD 30
James CODD 11
Dau: Sarah CODD 8
Dau: Martha CODD 6
Dau: Hannah CODD 4 (b abt 1887)
All b Rickeston
1881: Rickeston Mill, Robeston West, Milford, Pe,brokeshire
RG11 / Piece: 5416 / Folio: 107/page5
Head: Tobias CODD 65, Corn miller with Land, b St Ishmaels,
Wife: Letitia CODD 61, b Marloes
Son: Tobias CODD 28, marr, Millers son, b Robeston West
Wife: Mary CODD 21, marr, Miller son's wife, b NK
Grandson: James CODD 1, Millers son son, b Robeston West
Looks like Tobias jnr's wife1 Mary died btw 1891 & 1901, and he had remarried to wife2 Jane by 1901.
MARRIAGE:
Haverford West Jun Qtr 1893 Ref: 11a, 1519 and on that same page:
Tobias CODD
Jane JOHN
Bet Jane came to the marriage with some JOHN children in tow! see reply 16
Forward to 1910:
MARRIAGE: FreeBMDJohn MORGAN - Jun Qtr 1910, Haverfordwest, Vol 11a, Page 1_59
The transcriber hasn't worked out the full page nr so John's not linked to his possible bride choices. The scan of the image though, shows clearly his number is page 1859.
If you search FreeBMD for that year & Qtr, district, Volume and full page nr - there we get Hannah CODD, sitting with another bride and just one groom.
So it looks a lot like Hannah married John MORGAN using her step-father's surname - but used her birth surname as the mms on her child's birth record?
Cheers
AMBLY