A message from a person who is a family researcher in this family, re. Hermann Willer Hansen, died 20 Aug 1896, buried St. Matthew Cemetery, and gives his contact information:

http://www.cravescavesandgraves.com/2009/11/st-matthew-cemet...

Online post by him says he is descended from

Herman Willer Hansen
married
Anna Christina Schmidt
both of Denmark, married in St. Louis MO.

Their son Herman Willa Hansen b 1878 [= "Willie" probably]
married
Martha Roelke

Their son
Herman Willa Hansen b 1901

============================================
RE. Prussia - could the place of origin be Schleswig-Holstein?

Could this be Anna:

Navn: Schmidt, Anna Stilling: Pige
Alder: 18 Bestemmelsessted: N. York
Kontrakt nr.: 115000 Forevisningsdato: 5/12/1870
Sidste oph.sogn: Haderslev Sidste oph. amt: Haderslev
Sidste oph.sted: Haderslev Bestemmelses land: USA
Bestemmelses by: New York City Bestemmelses stat: New York State
Skibsnavn: Indirekte
IDkode: I6971S1808