My grandfather was William ERKS who was born in Reepsholt, Ostfriesland, Germany in 1858. William came to America about 1880 and settled in Illinos. He married Trientje ALBERS and they had 13 children.
His brothers, Rudolph ERKS and Herman Christian ERKS also emmigrated [but not together as far as I can find] as did an uncle, Johann Dietrich ERKS.
I'm in contact with descendants of Rudolph and Johann but so far, not Herman. Always looking for new cousins.