Hi Peter - Your English is very good and your thoughts about the origin of the name Thesing are very interesting.Perhaps you might like to read what I came up with as a possible origin.
The surname Thesing is a variant of the old German name Thessen.Other variants of Thessen include Thesen, Thes, Thesenvitz and Tessen.Thessen is itself a variant of the name Tesche which refers to “one who made purses” and derives from the word tasche meaning purse.References to this surname or its variants have been recorded as early as the 1300’s.
The name Thesing originated in Germany and its German spelling has been recorded in Church records as Thesing, Tessing, Thiesing, Theising and Theissing.This variation is undoubtedly attributable to the spelling preferences of the priest who recorded the name in Church records.
Paul Thesing from Dayton, Ohio has claimed his relatives who lived in Kansas pronounced their surname TAY’-SING.Carl Thesing from Ankum, Germany pronounces his name TEA’-ZING.However, the more common US pronunciation is THE’-SING with the THE’ pronounced as in the word thesis.I must point out that I recall my immigrant grandfather pronouncing it THE’-ZING.
On November 1, 1997, there were only 641 Thesing households listed in the German telephone directory and 360 Thesing households listed in the US telephone directory.Thesing would not appear to be a common name in either Germany or the United States.
A fellow named Bernard H Thesing (TAY’-SING) emigrated from Wullen bei Ahaus in the Kingdom of Westphalia, about 10 miles south of the Kingdom of Hannover.He and his brother Andrew helped select the site for a town they would call Windthorst, Kansas.Windthorst is no longer found on any map of the region.It is located close to and shares a school district with Spearville, Kansas.
When religious preferences can be determined, most Thesing immigrants to the United States claimed to be Catholics.