Beckmann - 1875, Steinbrink, DEU > USA (1891).
Beckman  - 1822, HAN, DEU.
Beckmann - 1820, HAN, DEU > OH, USA. archive
Beckmann - 1853, Esdorf, Hanover > Wheatland, IA, USA. archive
Beckmann - 1800, Bissendorf, Hannover > Amsterdam. archive