Kas T Jo is the phonetic form for Castillo, which is Spanish for Castle as well as our Family name.
Although we speak Spanish, more appropriate is to say we speak Castilian, one of few dialects spoken in Spain. Dialect that we inherited from settlers that followed on Christopher Columbus who, after meeting with King Ferdinand and Queen Isabella in the Alcazar Castle in Cordoba, Spain, initiated his famous voyage to the Americas leading to the discovery of Little Venice, known as Venezuela nowadays, where we happen to be from.