It is interesting to see, that within the hessian and saxonian families the name Hutstein resp. Hutsteiner was obviously used without taking to much care of the ending -er (or any -h- in between). For a single person it is possible to find all spellings in old documents in parallel.
I recognized in the records that in Bavaria and Austria the name is very rarely used with an -h- around 1800, and only one family lost the ending -er, also around 1800. Therefore, all ‚Hutstein‘ family members of the austro-bavarian family lines have a single ancestor – Johann Hutstein – born in 1800 in Künzing.
One special thing to say about Huetsteiner: this -ue- is due to bavarian pronouncing of ‚Hut‘, i.e. ‚Huet-‚ is equivalent to ‚Hut‘.
In very old church records it is often seen, that Hutsteiner is written as ‚Hutsteiner‘ or ‚Hutstainer‘. In German language -ei- is equivalent to -ai-, pronounced in English as ‚i‘.
During my research in Hessen and Westphalia I recognized that for the catholic family mainly the name ‚Huthstein‘ was recorded, while the lutheran ones most of the time were known as ‚Huthsteiner‘.
In Saxony I found the only occurance of ‚Huttsteiner‘ with double ‚t‘ in records before 1750.