On the 24 April 1902 Hans Carl Marthinsen travelled to USA from Hamburg in Germany with S/S Deutschland, without his family. The year after he came back to pick up the family, and they travelled 11 April 1903 from Liverpool in England to Boston with S/S Saxon.
In the Census 1905, 1910 and 1920 the family lived in Kenosha.
Hans Carl was naturalized on the 12 february 1912.