Any pre-1700 member could have completed this merge. One profile was PPP. The PPP was there to (1) indicate that the protected profile should be the merge destination for any merge and (2) prevent the merge from being done in the wrong direction (PPP does not make merging foolproof, but it helps!).
I merged the profiles and I also added some research information to his profile and the profile for his first wife. The merge could have been completed without the additional research.
All the names a person went by should show up in the biography and profile data fields. The determination of LNAB is based on guidance in Help:Name Fields and on the New Netherland Project page. Records for this man are sparse, but he is named Wouter Jansen on two records, and since he was born in New Netherland to Dutch parents, that is a logical choice for his birth name. When he lived in English-speaking community in Connecticut, he seems to have gone by the name Walter Johnson, so the names Walter and Johnson belong in other name fields.