Jaasau in the Bible Encyclopedia - ISBE
ja'-a-su (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."