Ronto Ronto can refer to: ronto-, a metric prefix denoting a factor of 10−27 Rontó, the Hungarian name for Rontău village, Sânmartin Commune, Bihor County, Romania Toronto, a city in Canada Topics referred to by the same term This disambiguation page lists articles associated with the title Ronto.If an internal link led you here, you may wish to change the link to point directly to the intended article.