I've got a Wilhelmina Moerke in my ancestral files. She was born in Finsterwolde on Nov. 15 1877. In her birthrecord she's mentioned as Willemtje Moerke, but when she emigrated to the USA in 1901 her firstname changed into Wilhelmina. She died May 29 1915 in Campbell Minnnesota.
Her parents where Jan Moerke and Wubbina Luikens.
Wilhelmina was married with Derk Hector. His first name changed in the States in Richard Tobias. Derk or Richard Tobias Hector was born June 13 1875 in Oudedijk (near Beerta and Nieuwe Schans). He died June 26 1950 in Sioux Falls, South Dakota.