'Pequeno' is not a cultivar name.......it just means small :-)) So what you have is a dwarf olive and most dwarf olives are fruitless. Also, most olive cultivars are self-sterile or nearly so anyway and require a partner for cross pollination. Little Ollie/Montra', 'Skylark' and Wilsonii' are some of the more common dwarf cultivars and are all fruitless.