Does this check out. Annie Barrett appears in 1921 with this man listed below I believe her brother, both born Loughor
WILLIAMS, ANNIE MARY mmn FRANCIS
GRO Reference: 1889 J Quarter in LLANELLY Volume 11A Page 875
WILLIAMS, OLIVER STEPHEN FRANCIS
GRO Reference: 1901 M Quarter in LLANELLY Volume 11A Page 1103
1901 ref
Piece 5086
Folio 67
Page number 45
The 2 births above appear with parents Daniel & Sarah A
Marriages Dec 1887
Francis Sarah Ann Llanelly 11a 1323
Williams Daniel Llanelly 11a 1323
SS
added-I cannot find the extra 3 Barrett daughters birth's who appear with family in 1921 census. Eldest daughter's birth easily found.