* A place: Is Sandiha a town, city, or region? If so, where is it located? Knowing the location will help determine the ethnic makeup of the population.
* A person: Is Sandiha a person's name? If so, we need more information about them (like where they were born or their family history) to figure out their ethnic origin.
* Something else: Is "Sandiha" a term or concept that I'm unfamiliar with?
Once you provide more context, I can help you find the information you need.