There are a few Grieters onboard the Augusta; it looks like the patriarch is: Hans / Johannes Jacob Kreider .
I haven't made too much progress putting them into any kind of known context. For example, web trees have Hans Jacob as "Martin", dying in Lancaster County PA. Otherwise the birthdate matches. But "Martin", according to the trees, has a brother Jacob, who was born several years later. And "Martin", according to the one Ancestry tree I found, has the parent "Hans Jacob", born twenty some odd years earlier than the shipboard manifests indicate. Furthermore, he has 23 children.
So the tree I've got so far seems of low confidence. This discussion is about crisping up the Grieters/Krieders.