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Around the world, كاسترو (Castro , Kastro , كاسترو ) is a common principally boy's, but very infrequently feminine first name. The first name كاسترو is habitual in Guadeloupe, where it is quite a common boy's name, Luxembourg, where it is quite a rare unisex name, and Guatemala. In absolute terms, the name is most common in Philippines, Tanzania, and Angola. Much more prevalently, كاسترو is the last name as well as the forename.
كاسترو is also a name for the fictitious and mythical characters: Castro , the operatic character in the opera Al gran sole carico d’amore, Al gran sole carico d'amore and Castro Gomes , character in Os Maias.