3 occurrences in 3 dictionaries
Reference: Jaasau
Easton
fabricator, an Israelite who renounced his Gentile wife after the Return (Ezr 10:37).
Morish
Ja'asau
One who had married a strange wife. Ezr 10:37.
Smith
Ja-a'sau
(whom Jehovah made), one of the Bene-Bani who had married a foreign wife.
(B.C. 459.)