On my maternal side I have 18 variations and counting. I included info data when, where, whom, why. About 125 years ago there was no uniform spelling, ergo you could have 12 children in a family and 14 different spellings of the name. Not to count transcribing errors, misspellings, typos etc. in one official entry I had two spellings for the same name. So the errors can occur from our uneducated cousin all the way to government officials: probably the earliest spelling I have of the name is Krzysko .