That is around the same time John (Johannes) Cordie arrived from Prussia. He came with a brother Mathias (Mat) that I know for sure and I have seen Eva's name listed as well in my searches. The settled in Iowa first then John and Mathias moved to Minnesota in the Traverse County area.

I received an interesting story that I am trying to find more information on about why the Cordie's left Prussia. I was contacted by someone writing a thesis paper in Germany about the family and as searching to find where the family ended up in the USA.

Here is what he sent me...

I am from Germany and I am doing my final master degrees in medieval history. I want to please your pardon for my English and for writing this mail without you knowing me. As a german I am no nativespeaker but I hope you will understand my request and can give me a little help.

For my final degrees I do a research on the little town Coerde, near the dutch border, which was first named in the late 11th century.
(wikipedia link to Coerde http://wikipedia.qwika.com/de2en/M%C3%BCnster-Coerde)
Today Coerde is a quarter of Munster. In the 19th century a lot of emigrants moved from Coerde to America. Also the family Cordie did, but not direktly. After a bad family desaster in the early 19th century the Cordies first moved to the region of Limburg/ Netherlands. Maybe there lived relatives.

To see where people with the surname Cordie live today I looked up at facebook and found some Cordies living in the US. Now I try to find out if those Cordies are descendants of the former rich and influential family from Coerde. Do you know if all in the US living with the name Cordie are descendants from one european family? (maybe a big family. It verisimilar that cousins, aunts and uncles came under the leadership of Anna Marie Katharina Cordie in the middle of the 19th century. She was the head of the dynasty and must have been a very awe-inspireing person already in young years.

May this information will help you to answer my question. Its what I found out the last 6 month in archives in Munster and Limburg:
The name of the town "Coerde" comes from latin "Curtis" and means an estate or a tower of a knight with a related farm. Archaeologicaly we know of a very early church at this place. It can be for sure that the family who lived there must had an important role for the whole region. The bishop of Munster himself consecrated the little church! Controling the pesants, farming&food, trading and the clergy made them wealthy and military strong (again and again named weapon smiths from France and Switzerland came to the smalltown Coerde).
The ruling family was named like the place, but the spelling in meadival times is often different. The only few monks who could write in these dark ages wrote down names like they hear them. The earliest spelling is "Curithi" (it is mentioned in a drudgery-document from Cappenberg Castle in 1089). In 15th century it turns to Curdie, Corthie or Cordie. From 18th century till today the name Cordie is official. Other forms do not longer exists (as I know yet). The Cordie-Family has been a wealthy land-genty dynasty. Today a lot of other familynames and streetnames remember to this chivalrous linage (for example the last name Kortenhorn or Cordehorn is very common here, which means in now days german "den Cordies hörig" - "hearing (horn) to "adscripted to Cordie"; the Coerheide or the Coerdemarket are names for places of local popularity).

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Between 1815 and 1842 there must have been a family disaster. Heinrich Cordie came back from the Napoleonic Wars in 1814. He had been away for almost 13 years. In this time his wife died (didnt found out the year, but it must be before 1810). The oldest daughter Anna Marie Katharina Cordie took the responsibility over the whole family and the economic matters. In 1814 when her father returned she was only 19 years old. Under Annas control the estate expanded, More than 200 workers with their families lived on her ground.
When Heinrich Cordie came back he displaced his daughter Anna. At first she left her position by choice, because her father was the legal head of the family. But Heinrich was discribed as a drinker, brutal and he didn´t care much about the farmland and the workers. After two years he had a lot of depts and there had been only 64 workers left.
There is the legend that soon old soldier friends of Heinrich in Coerde arrived. One of them had told Anna that the man who returned not was Heinrich Cordie. Anna took the man who said he was her father to task but he beat her almost to death. Anna seeked for revange. Secretly she sold what her family was left and send all her brothers, sisters and cousins to the northern sea to get a passage to New York. She stayed in Coerde and made Heinrich Cordie drunk. After that she enchained him and pulled up the man all alone the church tower. She tied up the rope at a tree and followed her family. Heinrich Cordie was fond many days later, not dead but without any sense of hearing from the loud churchbells he hung close at.

Anna followed the rest of her family. The setteled near the city of Limburg. It is not clear for how long. Maybe just a few month, maybe 12 years. Here Anna organized the emigration to the US for her whole family. My thesis is that the family was to big and the capital was hard reduced because of the escape from Coerde. So Anna earned the money for all of her relatives. She send them to America in waves. First the young men, who had to search for work there, after that the oldest relatives and children, at last Anna took the passage to New York. She died on the passage on bord of the "Baltimore" in the first days of april 1842.
Anna Marie Katharina Cordie had children, but how much is unknown, als well as the father(s?) is unknown. I only know about her son Johannes Cordie, born in 1823.