Sixhundredmen - These were not the whole, for we find they had children, etc., Judges 18:21; but these appear to have been six hundred armed men.
SDA Bible Commentary (limited)
Volume 1-7
11. Six hundred men. The whole clan did not migrate, but perhaps only the more enterprising members and those who did not have suitable land. Inasmuch as the 600 men took their families with them (v.21), the whole group probably numbered from 1,500 to 2,000 people.