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Family name Sonar (Soni , Sonar , Sonner ) , around the world, is a prevalent last name. The family name Sonar is characteristic of India, where it is quite a common surname, Guernsey, and United Arab Emirates (explore the name in all countries). Measured by absolute frequency, it is the most numerous in India, Nepal, and Indonesia. Also, Sonar is the forename as well as the last name.