Mr Adolf Fredrik Dyker was reportedly born at sea ¹ en route from New York to Sweden on 16 December 1888.

He was the son of Gustaf Fredrik Dyker and Anna Lovisa Andersson (b. 1844). His father had purportedly been living in New Haven, Connecticut from 1870, becoming a naturalised citizen in 1879 and it is understood that Adolf also spent a portion of his life living in the USA in early childhood. His father ran a café at Upplandsgatan 11 in Stockholm and Adolf was educated in that city.

Adolf arrived in New York aboard the Caronia on 6 March 1905, later working for a bank in New York before he eventually settled in New Haven, Connecticut where he worked as a tram conductor. He was married around 1909 to Anna Elisabeth Judith Andersson (b. 1889), a native of Worcester, Massachusetts who was of Swedish parentage. They lived at 468 Washington Street, New Haven, Connecticut and appeared on the 1910 census living at the home of Anna's parents in Orange, New Haven. By late 1911 it is believed they were building their own house in New Haven but the death of Adolf's father on 1 December 1911 compelled the couple to travel back to Sweden to settle his estate.

It was on their return from Sweden that they boarded the Titanic at Southampton as a third class passengers (ticket number 347072 which cost £13, 18s).

After the accident, Adolf placed his wife into lifeboat 16, kissed her and stepped aside. Dyker died in the sinking and his body if recovered, was never identified.

The Mansion House Fund paid 874.08 Kr (£48) to his mother.