Twenty years ago, Avigad published a seal of unknown origin, bearing the same two names being discussed. It read “Azariyahu/Hilkiyahu.” His commentary said simply that both these names were common and there was nothing to add. There is no connection between this seal and the City of David bulla except the names. The seal Avigad published lacks the usual “Belonging to” or “son of” See “Six Ancient Hebrew Seals,” in Sefer Shmuel Yeivin (Jerusalem: Qiryat Sefer, 1970), p. 307 and plate 4:1/A (in Hebrew).