This is a difficult question to answer without knowing more about your particular situation. Some factors that could affect the cost of family insurance in the UAE include the ages and health of the family members, the type of coverage desired, and the insurer chosen.
That being said, it is possible to give some general ballpark estimates. For a family of four, a basic health insurance plan with modest coverage may cost around AED 10,000 per year. A more comprehensive plan with higher coverage limits could cost closer to AED 20,000 per year. Ultimately, the best way to get an accurate quote for your family is to contact a few different insurance providers and ask for a customized quote based on your family's needs.