Arend Grothaus 1831

I am trying to trace my great-grandfather's line back to Germany. He came to the U.S. in 1859 and spent most of his life as a farmer in SW Ohio. But so far I have struck out in all attempts to connect him to Germany. I think it is reasonably likely that he is a direct descendant of Johann Arend Grothaus, whose son Jorgen (Georg) Henrich Grothaus was born in Lengerich, Germany in 1727. He died in Tecklenburg in 1784. Jorgen’s son was Johann Hinrich Grothaus, born in 1753 in Lengerich. I have no record of his death. He is not likely to have been Arend Grothaus’s father, but he could certainly have been his grandfather, or perhaps great-grandfather. (Information on these German Grothauses is via the familysearch website.) If anyone has any more information on Johann Arend, Jorgen Henrich, Johann Hinrich, or of course my great-grandfather Arend, I would greatly appreciate it.