Isaak Wolf (17th /18th century)

Sometimes it is claimed that  Isaak Wolf who is mentioned in 1688 is the first Jewish inhabitant of Steinsfurt who is known by name. But there are problems with this:

The marriages of Isaak Wolff with Elisabetha Ludwig (January 7th, 1673) and with Anna Catharina Ganser (November 26th, 1709) are both recorded in the reformed church registers of Steinsfurt. So are the christenings of 9 children. Finally he was later named „Ratsverwandter” (member of the council), a position that could only be held by Christians.

Maybe he was a Jew who had been baptized – because both Isaak and Wolf are common Jewish names?