source: http://aidaonline.niedersachsen.de/
Auswanderersuche (search for migrants) in the State Archives of Niedersachsen, Germany
(I searched Ubbenga and this was one of two hits)

Name Ubbenga, Meindert
geb.
Geburtstag 13.10.1847
Geburtsort Groß-Midlum
Wohnort Groß-Midlum
Beruf Dienstknecht
Familienstand
wh.
Tag d. Bekanntmachg. 24.2.1872
Jahr d. Auswd.
Sonst
Fundstelle Rep 15, 1771

Meindert was a farm worker. Was born and lived till the emigration in Gross Midlum which is about 8 km away from Emden Ostfriesland. He made his emigration plans known to the authorities on the 24th of February 1872. Most migrants from Ostfriesland left straight after this proclamation.
Good look with your search!