[He looks stunned by the question, like it's just occurred to him that he didn't give her his name. He rubs the back of his neck nervously and he laughs under his breath.]

Heh...yeah, that would make it complicated huh? My name's Hiro...Hamada. There's another Hiro in the colony, Hiro Kageyama? He's been here even longer than me but he's also older than me so...not him. Does...that help?