The family belongs to the old Bavarian landed gentry. Johann Franz saw the light of day on 16.10.1649 Train at the Castle, the son of Johann Christoph Abensberg (1608-1685) and his wife Regina of Kürmreith.
He began as a page at Prince Albert Bishop Sigismund of Bavaria, Freising. 1671 He graduated from the Munich Jesuit High School and studied theology. 1673 he received a canonry of Freising and received a year later ordained a priest. Since 1684 He was dean of the cathedral and the main opposition to the provost of the chapter on Zeller bodies village. At the 29.1.1695 He was elected by a large majority of the Prince Bishops.
As a major collector of genealogical, He took 1722 the Benedictine Karl Meichelbeck to Freising and opened his archives to the writing of "Historia frisingensis", the first complete and critical history of the diocese in Germany.
This, it is the “Systematic processing of the information contained in Meichelbeck's Historia frisingensis document collection” from the year 1842 by Carl Franz Häberlein. Today, this early work Meichelbecks is considered the first modern source-critical work of history.
The Prince-Bishop Johann Franz Freisinger Eckher of Kapfing and Liechteneck (1649-1727) devoted his time as a canon intensive genealogical research. His goal was, the “Bavarian strains book” of Wiguleus Hundt (1514-1588), to work on new. Eckher it was not possible, fully complete the work. The five-volume draft revision of the “Originate book” is obtained in addition to other sources. He died on 23. February 1727 in Freising.
Collaboration with Johann Michael Wilhelm of Prey
During his time as was Prince-Bishop of Freising no longer devote the usual amount Eckher his historical studies, Therefore, he entrusted his court- and Johann Michael Wilhelm Kammerrat of Prey (1690-1747) in 1713 so, continue the historical and genealogical research, so the pedigree can be completed, as well as the Grave stone book (Cgm 2267) The result of the work of Prey found in the 33 Volumes of “Genealogy of the Bavarian nobility“. This was completed with the 1974 edited by Baron Niklas von Schrenk Register for the Bavarian nobility genealogy
The alphabetical collection of genealogy of the Bavarian nobility (Cgm 2268)
This initial work led 1695 in an alphabetical collection of genealogy of the Bavarian nobility as a draft for a revision of Hundt's book tribes - a total of five volumes on 1.144 Eckher of hand written pages, today under the signature Cgm 2268 in the Bavarian State Library in Munich be kept. Band 1, Band 2, Band 3, Band 4, Band 5 Extract Bavarian noble families from the VII parts of the genealogical collection of Carl Schiffer, Baron Grosalbershof – BSB Cgm 2274
Grave stone book (Cgm 2267)
- Krick, Ludwig Heinrich: 212 Genealogies of noble families where religious dignitaries, Bishops, Canons, ABTE etc.., the diocese of Passau have sprung: With the inclusion of d. spiritual Würdentäger other dioceses, Schweiklberg in Vilshofen: Missionskloster 1924
- Huben Steiner, Benno: Johann Franz Ecker of Kapfing and Liechteneck, in: New German Biography 10 (1974), S. 485 f.
- Kneschke, Ernst Heinrich: New general German nobility Lexicon, Band 3, Page 22 1861
- Baumann, Franz Ludwig: The Bavarian historian Karl Meichelbeck (1669-1734) Keynote speaker at the celebration of the 138. Foundation day, Munich 1897