I wonder if this is sister Alma Charlotte in 1879 with parents and sister - from Swedens Household Clerical Survey
Johan Peter Berntsson Head b 1854
Christina Mariaa Olsdotter Hustru (Wife) b 1854
Alma Charlotta Barn (Child) b 1879
Mathilda Barn (Child) b 188?
Alma Charlotta
Relationship Barn (Child)
Residence Age 0
Birth Date 4 mars 1879 (4 Mar 1879)
Birth Place Starrkärr
Year range 1879
Residence Place Göteborgs Gustavi (Domkyrkoförsamlingen i Göteborg), Göteborg och Bohus (Göteborg), Sverige (Sweden)
Also found a possible birth for Gerda
Gerda Eugenia
Birth Date 27 dec. 1889 (27 Dec 1889)
Birth Place Christine, Göteborg och Bohus (Västra Götaland), Sverige (Sweden)
Father Johan Peter Berndtsson
Mother Christina Maria Olsdotter