Do we know anything about Obito's parents? After Rin was killed, he went rogue and attacked Konoha with the Nine-Tails, and he was obsessed only with his Tsuki no Me plan. Didn't he have any sibling, parent, or someone to care about?? I don't remember seeing anyone close to Obito besides his teammates.
The Naruto Wikia article on Obito Uchiha states:


  Obito grew up not knowing who his parents were, leaving him alone and forced to fend for himself. This sad upbringing led Obito to dream of one day becoming the Hokage so that the people of the village would acknowledge his existence.


So I think no, he didn't have any parents, siblings or friends, until he met Rin and Kakashi. That is why he was obsessed with the Eye of the Moon plan. On second thought, I think Obito was rejected even by the other Uchiha, so he was totally alone.