Jaasau
JAASAU, JAASAI jā’ ə sō, jā’ ə sī. KJV and ERVmg. forms of Jaasu, one of those who had married a foreign wife and was compelled to give her up (Ezra 10:37).
International Standard Bible Encyclopedia (1915)
(the Revised Version (British and American) and Kethibh, ya`asu, meaning uncertain); (the Revised Version margin and Qere, ya`asay), (the King James Version): In Ezr 10:37, one of those who had married foreign wives. Septuagint translates the consonantal text as a verb, kai epoiesan, "and they did." 1 Esdras 9:34 has "Eliasis."