I found a German web page that lists history back to 928, before Germany was country. There is a castle called Burg Rhienfelds, built in 1245 by a Count Dieter above the town of St. Goar. The location is on the Rhine, the name was Dieter. After the 30 Years War, several lines (maybe 4) made it over to the US, with a name change to Teter, arriving before the Revolutionary War and staying in the PA, WV,VA, area. With more than a few entries found of aiding the fight against the British. In 1823 there was a $1 Will allocating the primary wealth of the family to the two youngest children. Elder children were very upset and broke off from the family, changing names and moving further west, north and south. Moving into Ohio, Ill, Iowa before the Civil War and to escape Indian attacks, many served in the war. My line went west to Washington and Oregon, then to Montana and the MontColoWyoBraska area.