Ward/Johnson marriage

Are you certain about the date of the marriage of Percy & Delia ?

FamilySearch has a marriage (transcript & image) of a Percy J. Johnson & Delia Ward in Boston on the 16th Sep 1897 , Percy's parents are recorded as John Johnson and Bridget Carney, unfortunately his place of birth is recorded as just 'Ireland'

Percy gives his age as 24 so born around 1873, so I had a look for possible births using his parents names and found several likely siblings all in Dublin city - e.g. Stephen Johnson born  27th December 1876. Place of birth is 37 Nicholas Street, Dublin city, parents John Johnson a shoe maker & Bridget Kearney (equivalent to Carney), the informant is father John using his mark. Shoemaker is also Percy's occupation on the marriage in Boston...

I suspect that Percy may not the name he was originally registered with - fairly unusual name here at the time...

There are several versions of that 1897 marriage on FamilySearch - including this one...most of the details are the the same but this one includes slightly more detailed places of birth for the couple - 'Dublin' Ireland for Percy,  and Birkenhead, England for Delia.