MATTENAI măt’ ə nī' (מַתְּנַ֔י). 1. A priest of the house of Joiarib in the days of Joiakim (Neh 12:19).
2. A Jew who was among those who were induced to divorce their foreign wives by Ezra (Ezra 10:33; 1 Esd 9:33; KJV ALTANEUS, ASV MALTANNEUS).
3. Another Jew who was induced by Ezra to divorce his foreign wife (Ezra 10:37).
International Standard Bible Encyclopedia (1915)
mat-e-na’-i, mat’-e-ni (mattenay, "liberal"):
(1) (2) Two who married foreign wives, one a son of Hashum (Ezr 10:33; in 1Esdras 9:33 "Altanneus"); the other a son of Bani (Ezr 10:37).
(3) A priest in the days of Joiakim son of Jeshua (Ne 12:19), representing the house of Joiarib.