In the Nederlandsch Tijdschrift voor Tandheelkunde (1946), a list of dentists killed in the war appears on pp. 118-119. Philippus Abraham Alexander was among them.
This person is mentioned in a CABR document of the Dutch Nationaal Archief. The CABR contains detailed information concerning this person’s arrest, inv. nr CABR 76358 + 76310 + 76227.