As far as I know, all languages in the Finnish-Ugric family use a similar system of declension suffixes. Usually, the different declension cases are similar in

As far as I know, all languages in the Finnish-Ugric family use a similar system of declension suffixes. Usually, the different declension cases are similar in number and their functions, but the actual suffixes used may vary from language to language. Proto Indo-European is indeed believed to have had a suffix-based complex inflection system, which the modern Germanic prepositions either have replaced or developed from.