Strong's #3299: Ya`asuw (pronounced yah-as-oo')
from 6213; they will do; Jaasu, an Israelite: -Jaasau.
Brown-Driver-Briggs Hebrew Lexicon:
ּׂ
ya‛ăśû
Jaasau = "they will do"
1) one of the descendants of Bani who took a foreign wife during the time of Ezra
Part of Speech: noun proper masculine
Relation: from H6213
Usage:
This word is used 1 times:
Ezra 10:37: "Mattaniah, Mattenai, and Jaasau,"