The following table shows the census data for Anna A. Mohrmann Tangeman's household for each decade from 1850 to 1880. I created it to try to track Anna, whose name often seems to change. The head of household is listed in bold, and Anna herself in red.
I suspect that her name was "Anne Adelheid Mohrmann" at birth. This is the name that Joan Bullard reports from the Parish records in Germany. The pronunciation is likely to have been more like "Anna Adelheit Mohrmann", with the final E in Anne being voiced and not silent, and the final d in Adelheid, being the unvoiced "T" sound. The initial As in both names are likely to have been pronounced somewhere between the way Americans would say "Ah" and "Aw" and the "ei" combination in German is pronounces as an English long I, thus the "Odelite" spelling of 1880. 1860's Adeline is probably due to that being a more common English or American name than Adelheid".
|1850 Census||1860 Census||1870 Census||1880 US Census|
|William Tangeman||14||M||Wm Tangeman||24||M||Wm Tangeman||33||M||Willan TANGEMAN||Self||M||40||Male|
|Louisa Tangeman||17||F||Louisa Tangeman||24||F||Lenesa TANGEMAN||Wife||M||36||Female|
|Ann Tangeman||1m||F||Margaret Tangeman||10||F||Margert TANGEMAN||Dau||M||20||Female|
|Carl Tangeman||8||M||Charly TANGEMAN||Son||S||18||Male|
|John Tangeman||6||M||Johny TANGEMAN||Son||S||16||Male|
|Anna Tangeman||1||F||Hanah TANGEMAN||Dau||S||11||Female|
|Jno Munt?||24||M||John MONT||Other||M||35||Male|
|Anna A. Tangeman||54||F||Adaline Tangeman||65||F||Odelite TANGEMAN||Mother||W||82||Female|
|August Tangeman||11||M||Augustus Tangeman||21||M|
|George Tangeman||11||M||George Tangeman||21||M|