"... Hermann Otten born about 1790 and his son Anton Bernard Otten born January 20, 1821. Immigrated to Reading, Pennsylvania area about 1850 (?) then to Milwaukee, WI. Hermann Otten was said to have married Adelheide Aleid sometime about 1815-1820 in Westfalen. I am interested in any help on this lineage ..."
Some "German" records on this Otten family can be found in Milwaukee's German papers for the generations you've posted -- maybe some surprises too, like 3 yr old Eleanora, daughter of a Hermann Otten? Most of these date from the 1870s-1880s.
"Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007 ...