from the Spanish guanábana
The fruit that Filipinos call guyabano has the scientific name Anona muricata. It was introduced from Mexico to the Philippines during the Spanish colonial period.
Other spellings: guayabano, guanabana
Guyabano juice is popular enough in the Philippines that it is sold in tetra-paks.
Where to buy? In the United States, the ecommerce site Amazon carries all sorts of guyabano products — flavored drinks in cans, pouches, and bottles… organic leaves for teas… plant seeds… even lamps with the leaves’ design as a motif.