Upon obtaining residency in Kuwait, an employed man can bring his wife and children to Kuwait to live with him. In order to do that, it is mandatory that he earns at least 450KD monthly (in case of possessing a 17-visa) and at least 650KD monthly (in case of possessing a 18-visa). If both man and wife work in Kuwait, they have the possibility to sponsor their children there but only if their salaries combined exceed 350KD monthly.
There are several limitations for this type of visa:
A wife can’t sponsor her husband.
While you can sponsor adult daughters and parents, you can’t sponsor sons of over 21 years old.
Dependent family members can’t work until they convert to a Kuwaiti work visa.