Corrupted names

Are there any resources that may be referenced to sort out the common problem of corruption of traditional names after immigration? Different alphabets and accents seem to be one source, especially during the middle and later 1800's. I have run into this on my Norwegian, Swedish and German research where the early U.S. records are not as accurate or precise (due to languages, accents and fellow immigrant recorders from many countries) as the records in Europe? I recognize that the European records were normally kept by professionals or trained recorders operating under a unified system. The differences in script also add to the confusion. My problem is I have not been able to establish a link from the U.S. to Norway and have to sort out the possibilites from the many "corrupted"/changed names that occured after arriving in the U.S. Some of what I have discovered was Ondell being changed to Ollendorf in two years and 100 miles. - Fortunately I found this and verified the documents with help from a fellow researcher. A similar names was changed from Ondell the Omdahl to Omlund and finally Lund. Any opinions and sources are welcome. Dick