My opinion death year was 1656, not 1657
https://www.geni.com/documents/view?doc_id=6000000206063777839
I've uploaded an original copy of his probated Will - The probate info is
Massachusetts, U.S., Wills and Probate Records
Name John Eyer
Residence Date Abt 1656
Residence Place Haverhill
Will Date 12 Mar 1656
Probate Date 12 Mar 1656
Probate Place Essex, Massachusetts, USA
Inferred Death Year 1656
Inferred Death Place Massachusetts, USA
Household members 8 children
John Eyer
Hannah Eyer wife
Children
Mary Eyer
Rebecka Eyer
Adadiah Eyer
Nathaniel Eyer
Peter Eyer
Robert Eyer
Thomas Eyer
Hannah Eye
The reason I prefer the original Will-