It is quite common to find misspellings and alternate spellings in the English written version of names. In colonial times, many could not read nor write, and the person recording the birth/marriage/death; deeds and census data wrote and spelled 'what they heard'.
For example: a simple name like ADAMS can be found as ADAMMS, ADAMES, ADAMMES, ADDAMES etc. and Smith can be SMYTH, SMYTHE etc.
In recording later census data and even in recording entry at Ellis Island - those taking in the information and filling out forms- still recorded what the 'heard' and often spelled name phonetically or by sound. Add an accent to that - and you get many spellings of both first and last names.
I have a friend whose mother is named on her entry papers to the US as 'Anna' and her sister - 2 years older- also 'Anna' because the person recording names at Ellis Island could not understand their parents. I think she said their real names were 'Anastasia' and 'Penelope" and their Surname spelling was changed also.
So when the two little sisters started school - in different grades - they had the exact same name but diiferent birth dates on their documentation!
The best you can do is compare documented dates and locations and related family members and make assumptions from there.