The names are not personal, but designate families. The seal of the high-priestly house of Seraiah was probably appended either by Ezra or Eliashib, both of whom belonged to it.
Related Commentaries of Nehemiah 10:2
Nehemiah 10:2-8
2 Seraiah, Azariah, Jeremiah,
3 Pashur, Amariah, Malchijah,
4 Hattush, Shebaniah, Malluch,
5 Harim, Meremoth, Obadiah,
6 Daniel, Ginnethon, Baruch,
7 Meshullam, Abijah, Mijamin,
8 Maaziah, Bilgai, Shemaiah: these were the priests.