Data from the Syros Alphabetical Birth/Baptism Register (1828-1858) are often inconsistent with those of Argenti or the actual church baptism register. The conflict partly arises from Gregorian-Julian calendar use and the imprecision and inconsistency with which data are entered; i.e., whether date of birth, date of baptism or date of registry entry. Furthermore, many of the original documents used for the register no longer exist. Contact: email: mail@gak.kyk.sch.gr; gakank.ermoupolis@gmail.com