נחמיה, פרק י״ב, פסוק כ״ג

The leadership of the tribe of Levi was carefully documented to preserve the names of the family heads for future generations. This group encompassed both the priests and the regular Levites, as all were direct descendants of Levi [מלבי״ם]. Their names were officially entered into a dedicated book of chronicles, which functioned as a comprehensive historical record of everything that occurred during that era [מלבי״ם]. The primary goal of this careful record keeping was to establish their names in history and ensure they would be remembered [מצודת דוד].

This practice of historical documentation, however, did not continue forever. The official recording of the family heads in the chronicles was maintained only until the era of Johanan [רש״י]. Johanan, who was actually the grandson of Eliashib [מצודת דוד, מלבי״ם], is also known by the name Jonathan. He is specifically noted in this historical context, rather than another figure named Jaddua, because both men were serving in the High Priesthood at the exact same time [מלבי״ם]. The historical registry ultimately came to a halt during Johanan's tenure. According to one perspective, it was Johanan himself who officially canceled the custom of recording the family heads, bringing a permanent end to this method of preserving their memory [מצודת דוד].