I think the information you've found is worth pursuing. Spelling differences across records are very common so a researcher must be alert to phonetic or creative spellings of names. A person has to take into account the time period and possible educational levels available within the given period and area at the time the record was made to evaluate it as a lead to their family. I'd suggest looking, also, for probate, will, and land records, if any, to see if there are any clues in those records to confirm your findings. I'd also check for naturalization records.