Miss Agda Thorilda Viktoria Lindahl was born in Stockholm, Sweden on 19 December 1886 in Jakob and Johannes parish, Stockholm, Sweden. Her parents were Carl Peter, a tailor b. 9 January 1864 in Vissefjärda, Småland, and Johanna Matilda (nee Carlsdotter; b. 31 October 1863 in Vissefjärda) Lindahl.

Her brothers and sisters were noted as Carl Gustaf, b. 14 July 1885, Hugo Vilgot Fabian, b. 20 July 1888, Vilma Klotilda Isabella, b. 4 June 1890, Vara Lavina Matilda, b. 26 July 1895, and Alf Helge Tycho Roland, b. 31 March 1903.

Her father had been a tailor with a shop at Kommendörsgatan 16 in Stockholm and living at Humlegårdsgatan 14/16, Stockholm. 

Agda's father had owned his own business but upon his death, on 22 June 1904, it was revealed that the company had been on the verge of bankruptcy.

After his death the family, near destitute, decided to emigrate to America, and did so in waves.

Agda and her sister Velma arrived in the USA on 11 December 1905 aboard the Cunarder Carmania; their sister Vera arrived a year later, and so on, but her youngest brother Helge remained in Sweden. Agda worked in New York as a waitress for a wealthy family and her mother Hanna lived at 20 Woodruff Street, Saranac Lake, Franklin, New York.  Two of her brothers apparently became sick and died soon after their arrival in the USA.

In 1912 Agda had been to Stockholm to visit her uncle August Lindahl at Apelbergsgatan 34, Stockholm and lived there for several months, with the intention of bringing her younger brother Helge across the Atlantic with her. However, he refused to travel and Agda had to return alone.

She boarded the Titanic at Southampton as a third class passenger (ticket number 347071 which cost £7, 15s, 6d) and was en route to join her mother in Saranac Lake although, according to the White Star list she was going to Alfred Johnson at 421 East Carlisle Avenue, Spokane, Washington.

Agda died in the sinking and her body, if recovered, was never identified.

The Mansion House Fund paid, via the Swedish consulate in New York, 875.52 Kr (£48) to her mother and her brother Helge in Sweden. Damage claims were arranged through American lawyers but no information of the sums awarded are available.

From the Red Cross files: 265. (Swedish) A girl, 19 years old and the principal help of her widowed mother, was drowned, while returning from a visit to her young brother in Sweden. The mother is a laundress, earning $8 a week.

Since coming to this country five years ago, the eldest son died of tuberculosis. Of the three other children, the elder daughter has tuberculosis, but works as a waitress in a sanatorium, earning $20 a month; the younger, who is 16 years old, has a decided tendency toward the disease.

The family live in a famous resort for tubercular patients. The son is with his grandparents in Sweden, to whom the mother pays board. The daughter who was drowned was the only strong one of the children, earning regularly $25 a month. The mother is getting old and will not be able long to continue the laundry work, which is her only means of support. The income of the daughter now working as a waitress is irregular and may stop at any time, as her health is precarious. The other daughter is likely to gain robust health, if cared for properly during the next few years. Of the appropriation made by this Committee $100 was used by the mother for immediate needs. The remainder has been placed in trust with a Society for the Prevention of Tuberculosis, which will keep close watch of the welfare of the family and pay a pension as it is needed. From other American relief funds the family has received $600. ($2,600)

Her mother Hannah later lived in 1758 Taylor Road in Cleveland, Ohio with her daughter Vera Hutchins. She died there on 2 September 1937. Vera (Mrs Harold Frederick Hutchins, née Lindahl) lived much of her life in Cleveland and had two sons. In later years she lived in Florida and died there in 1975. What became of Agda's other siblings is not certain.