Mahaifiyarsa, Dona Miguelina Elói Assis dos Santos (yar Enviro Assis), tsohuwar mai siyarwa ce wacce ta yi karatu don zama ma'aikaciyar jinya. Mahaifinsa, João de Assis Moreira, ya kasance ma'aikacin jirgin ruwa ne kuma ɗan wasan ƙwallon ƙafa ne na ƙungiyar Esporte Clube Cruzeiro (ba za a rude shi da babban Cruzeiro Esporte Clube ba). Bayan da ɗan'uwan Ronaldo, Roberto ya sanya hannu tare da Grêmio, dangin sun koma gida a yankin Guarujá mafi wadata na Porto Alegre, wanda kyauta ne daga Grêmio don shawo kan Roberto ya zauna a ƙaramar ƙungiyar, amma a ƙarshe aikin Roberto ya yanke ta.
25 ga Fabrairu 2005