I have rescued, from a flea market in San Antonio Texas, a formal confirmation document for Gustov Ackermann, born April 7, 1890, and confirmed on [March?] 27, 1904 at St. John’s Evangelical Lutheran Church in San Antonio, Texas. This document is in full color with religious pictorials, including the Last Supper, is printed and written in German, and is signed by Pastor O. Hartmann [Ossian W. Hartmann] who served as Pastor from 1903-1915. [The church has an online archive located at http://stjohnssa.org/history/church-archives/
which you may find useful in your research of the Ackermann family.]
I believe this to be the Gustov Ackermann who married Bertha Eisenhauer. If you believe this to be family and would like a digital copy of this document, please reply with an email address to which I may send attachments.