Hello,
Ibersho*ff* is an very old German lastname. Origin is a farm in D-49536 Lienen in Tecklenburg country, Westfalia, Germany. 1494 was the farm called Ypershoff, since 1580 Ibershoff. The name means farm of an Iber.
There were peers of Iber, died out about 1504 in Einbeck, Lower Saxony. 12 Km south is their village Iber. In Lienen lives a family Ibershoff
Ibersho*f* is a farm and a family with the same lastname in Appetingen in West-Friesland, Netherlands. One f is typical for netherlands language, in German two ff.
Simil is Ibersheim - home of an Iber - , near Worms at the river Rhine, first written in a donation from 767. Simil is also in France Iberville. The pears Iber du Iberville are died out. Luis XIV, roy de France, invest his govenor of Lousiana and Quebec Piere des Moins with the village Iberville. And this Iberville - he was no Iber - foundet in Louisiana and Quebec each an Iberville. My English is very bad, excuse me.
Konrad Iber in Germany