Syzygium samarangense is a plant species in the Myrtaceae, native to an area that includes the Greater Sunda Islands, Malay Peninsula and the Andaman and Nicobar Islands, but introduced in prehistoric times to a wider area and now widely cultivated in the tropics.

English common names include Jambu air (local Indonesian and Malay name), Thai: ชมพู่, lembu or lian-woo, wax apple, love apple, java apple, royal apple, bell fruit (or bellfruit), Jamaican apple, water apple, mountain apple, cloud apple, wax jambu, and rose apple. It is commonly known as makopa or tambis in the Philippines (though the closely related Syzygium aqueum are also called by these names). In Bengali language the fruit is called jamrul. In Malayalam, the language spoken in Kerala, the fruit is known as chambakka. In Vietnamese, it is called mận in the southern part of the country, and roi or roi hoa trắng in the northern part. (source)