Great job Flemming!
And I have found Mary:
Marius and Mary probably met on shipboard returning from separate trips to their homes in Denmark, and on the attached 1922 manifest Marius Jensen of Chicago is listed next after Mary Jensen and her brother Alfred from Tulsa, Oklahoma (passengers 17, 18, 19).
Jens Peter Alfred Jensen born 5 Aug 1898 registered for the draft 1917 in Tulsa.
JPAJ registered with the Copenhagen police in 1912-1914 and listed birthplace as Frederiksberg, and his birth is recorded there, parents Niels Jensen and Karen Marie Henriksen (Frederiksberg 1896-1899 opslag 278 no. 319)
Mary Ingeborg Elly Jensen born 28 Sep 1896, same parents (Frederiksberg 1894-1896 opslag 357 no. 528, attached)
Niels Jensen born 10 July 1869, son of Jens Jensen and Inger Nielsen
Karen Marie Henriksen born 22 Mar 1872, daughter of Anders Henriksen and Maren Olsdatter
Married 27 October 1895 (Frederiksberg 1894-1897 opslag 70, attached)