Indian Tamils of Sri Lanka are Tamil people of Indian origin in Sri Lanka. They are also known as Malayaga Tamilar, Hill Country Tamils, Up-Country Tamils or simply Indian Tamils. They predominantly descend from workers sent from Southern India to Sri Lanka in the 19th and 20th centuries to work in coffee, tea and rubber plantations. Some also migrated on their own as merchants and as other service providers. These Tamil speakers mostly live in the central highlands, also known as the Malayakam or Hill Country, yet others are also found in major urban areas and in the Northern Province. A majorty of Hill Country Tamils are predominantly descendants from the lower working castes of South India. Although they are all termed as Tamils today, some have Telugu and Malayalee origins as well as diverse South Indian caste origins. They are instrumental in the plantation sector economy of Sri Lanka.