Do you know anything more about your Iby family? My Iby's come from Horitschon, just a few miles from Raiding (Rajding?).
I have done extensive research into the Iby's of Horitschon, and do have records for Iby's in Horitschon who are not related to me.
I do have a Magdalena Kienzl (b.abt.1808) of Raiding who married Francsicus Iby of Hortischon; and a Anna Kienzl (b.abt.1830) of Raiding who first married Mathias Kautz, then Michael Iby of Horitschon. Micheal & Anna's marriage record for 1865 stated they would live in Raiding.